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Finding the Fourth Proportional to 86,612.40, 129,918.60 and 58,545.90

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Solution

The fourth proportional to 86,612.40, 129,918.60 and 58,545.90 is: 87,818.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,612.40 : 129,918.60 = 58,545.90 : x
  2. Step 2: Convert to fraction form
    86,612.40/129,918.60 = 58,545.90/x
  3. Step 3: Cross multiply
    86,612.40x = 129,918.60 × 58,545.90
  4. Step 4: Simplify right side
    86,612.40x = 7,606,201,363.74
  5. Step 5: Solve for x
    x = 7,606,201,363.74/86,612.40
  6. Step 6: Final answer
    x = 87,818.85

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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.