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Finding the Fourth Proportional to 52,761.43, 72,810.52 and 28,887.90

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Solution

The fourth proportional to 52,761.43, 72,810.52 and 28,887.90 is: 39,865.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,761.43 : 72,810.52 = 28,887.90 : x
  2. Step 2: Convert to fraction form
    52,761.43/72,810.52 = 28,887.90/x
  3. Step 3: Cross multiply
    52,761.43x = 72,810.52 × 28,887.90
  4. Step 4: Simplify right side
    52,761.43x = 2,103,343,020.71
  5. Step 5: Solve for x
    x = 2,103,343,020.71/52,761.43
  6. Step 6: Final answer
    x = 39,865.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.