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Finding the Fourth Proportional to 157,781.10, 217,712.43 and 90,700.14

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Solution

The fourth proportional to 157,781.10, 217,712.43 and 90,700.14 is: 125,151.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,781.10 : 217,712.43 = 90,700.14 : x
  2. Step 2: Convert to fraction form
    157,781.10/217,712.43 = 90,700.14/x
  3. Step 3: Cross multiply
    157,781.10x = 217,712.43 × 90,700.14
  4. Step 4: Simplify right side
    157,781.10x = 19,746,547,880.74
  5. Step 5: Solve for x
    x = 19,746,547,880.74/157,781.10
  6. Step 6: Final answer
    x = 125,151.54

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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.