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Finding the Fourth Proportional to 54,314.70, 81,472.05 and 39,345.90

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Solution

The fourth proportional to 54,314.70, 81,472.05 and 39,345.90 is: 59,018.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,314.70 : 81,472.05 = 39,345.90 : x
  2. Step 2: Convert to fraction form
    54,314.70/81,472.05 = 39,345.90/x
  3. Step 3: Cross multiply
    54,314.70x = 81,472.05 × 39,345.90
  4. Step 4: Simplify right side
    54,314.70x = 3,205,591,132.10
  5. Step 5: Solve for x
    x = 3,205,591,132.10/54,314.70
  6. Step 6: Final answer
    x = 59,018.85

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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.