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Finding the Fourth Proportional to 125,253.30, 187,551.90 and 91,792.20

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Solution

The fourth proportional to 125,253.30, 187,551.90 and 91,792.20 is: 137,447.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,253.30 : 187,551.90 = 91,792.20 : x
  2. Step 2: Convert to fraction form
    125,253.30/187,551.90 = 91,792.20/x
  3. Step 3: Cross multiply
    125,253.30x = 187,551.90 × 91,792.20
  4. Step 4: Simplify right side
    125,253.30x = 17,215,801,515.18
  5. Step 5: Solve for x
    x = 17,215,801,515.18/125,253.30
  6. Step 6: Final answer
    x = 137,447.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.