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Finding the Fourth Proportional to 136,169.31, 187,781.72 and 90,849.14

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Solution

The fourth proportional to 136,169.31, 187,781.72 and 90,849.14 is: 125,283.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,169.31 : 187,781.72 = 90,849.14 : x
  2. Step 2: Convert to fraction form
    136,169.31/187,781.72 = 90,849.14/x
  3. Step 3: Cross multiply
    136,169.31x = 187,781.72 × 90,849.14
  4. Step 4: Simplify right side
    136,169.31x = 17,059,806,376.57
  5. Step 5: Solve for x
    x = 17,059,806,376.57/136,169.31
  6. Step 6: Final answer
    x = 125,283.78

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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.