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Finding the Fourth Proportional to 92,387.70, 138,517.04 and 47,321.53

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Solution

The fourth proportional to 92,387.70, 138,517.04 and 47,321.53 is: 70,949.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,387.70 : 138,517.04 = 47,321.53 : x
  2. Step 2: Convert to fraction form
    92,387.70/138,517.04 = 47,321.53/x
  3. Step 3: Cross multiply
    92,387.70x = 138,517.04 × 47,321.53
  4. Step 4: Simplify right side
    92,387.70x = 6,554,838,263.87
  5. Step 5: Solve for x
    x = 6,554,838,263.87/92,387.70
  6. Step 6: Final answer
    x = 70,949.25

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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.