Home / 86,131,421.70-129,197,132.55-84,997,680.90

Finding the Fourth Proportional to 86,131,421.70, 129,197,132.55 and 84,997,680.90

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Solution

The fourth proportional to 86,131,421.70, 129,197,132.55 and 84,997,680.90 is: 127,496,521.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,131,421.70 : 129,197,132.55 = 84,997,680.90 : x
  2. Step 2: Convert to fraction form
    86,131,421.70/129,197,132.55 = 84,997,680.90/x
  3. Step 3: Cross multiply
    86,131,421.70x = 129,197,132.55 × 84,997,680.90
  4. Step 4: Simplify right side
    86,131,421.70x = 10,981,456,645,679,904
  5. Step 5: Solve for x
    x = 10,981,456,645,679,904/86,131,421.70
  6. Step 6: Final answer
    x = 127,496,521.35

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.