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Finding the Fourth Proportional to 86,908.16, 119,934.96 and 56,712.80

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Solution

The fourth proportional to 86,908.16, 119,934.96 and 56,712.80 is: 78,264.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,908.16 : 119,934.96 = 56,712.80 : x
  2. Step 2: Convert to fraction form
    86,908.16/119,934.96 = 56,712.80/x
  3. Step 3: Cross multiply
    86,908.16x = 119,934.96 × 56,712.80
  4. Step 4: Simplify right side
    86,908.16x = 6,801,847,399.49
  5. Step 5: Solve for x
    x = 6,801,847,399.49/86,908.16
  6. Step 6: Final answer
    x = 78,264.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.