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Finding the Fourth Proportional to 91,872.20, 137,800.20 and 25,306.40

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Solution

The fourth proportional to 91,872.20, 137,800.20 and 25,306.40 is: 37,957.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,872.20 : 137,800.20 = 25,306.40 : x
  2. Step 2: Convert to fraction form
    91,872.20/137,800.20 = 25,306.40/x
  3. Step 3: Cross multiply
    91,872.20x = 137,800.20 × 25,306.40
  4. Step 4: Simplify right side
    91,872.20x = 3,487,226,981.28
  5. Step 5: Solve for x
    x = 3,487,226,981.28/91,872.20
  6. Step 6: Final answer
    x = 37,957.37

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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.