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Finding the Fourth Proportional to 157,755.62, 217,711.58 and 86,142.30

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Solution

The fourth proportional to 157,755.62, 217,711.58 and 86,142.30 is: 118,881.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,755.62 : 217,711.58 = 86,142.30 : x
  2. Step 2: Convert to fraction form
    157,755.62/217,711.58 = 86,142.30/x
  3. Step 3: Cross multiply
    157,755.62x = 217,711.58 × 86,142.30
  4. Step 4: Simplify right side
    157,755.62x = 18,754,176,237.83
  5. Step 5: Solve for x
    x = 18,754,176,237.83/157,755.62
  6. Step 6: Final answer
    x = 118,881.19

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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.