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Finding the Fourth Proportional to 91,469.80, 137,214.54 and 29,125.72

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Solution

The fourth proportional to 91,469.80, 137,214.54 and 29,125.72 is: 43,691.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,469.80 : 137,214.54 = 29,125.72 : x
  2. Step 2: Convert to fraction form
    91,469.80/137,214.54 = 29,125.72/x
  3. Step 3: Cross multiply
    91,469.80x = 137,214.54 × 29,125.72
  4. Step 4: Simplify right side
    91,469.80x = 3,996,472,271.97
  5. Step 5: Solve for x
    x = 3,996,472,271.97/91,469.80
  6. Step 6: Final answer
    x = 43,691.71

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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.