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Finding the Fourth Proportional to 74,411.52, 102,687.36 and 42,578.88

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Solution

The fourth proportional to 74,411.52, 102,687.36 and 42,578.88 is: 58,758.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,411.52 : 102,687.36 = 42,578.88 : x
  2. Step 2: Convert to fraction form
    74,411.52/102,687.36 = 42,578.88/x
  3. Step 3: Cross multiply
    74,411.52x = 102,687.36 × 42,578.88
  4. Step 4: Simplify right side
    74,411.52x = 4,372,312,778.96
  5. Step 5: Solve for x
    x = 4,372,312,778.96/74,411.52
  6. Step 6: Final answer
    x = 58,758.55

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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.