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Finding the Fourth Proportional to 157,279.92, 217,044.12 and 90,210.48

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Solution

The fourth proportional to 157,279.92, 217,044.12 and 90,210.48 is: 124,489.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,279.92 : 217,044.12 = 90,210.48 : x
  2. Step 2: Convert to fraction form
    157,279.92/217,044.12 = 90,210.48/x
  3. Step 3: Cross multiply
    157,279.92x = 217,044.12 × 90,210.48
  4. Step 4: Simplify right side
    157,279.92x = 19,579,654,246.38
  5. Step 5: Solve for x
    x = 19,579,654,246.38/157,279.92
  6. Step 6: Final answer
    x = 124,489.22

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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.