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Finding the Fourth Proportional to 78,372.92, 108,154.24 and 42,562.64

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Solution

The fourth proportional to 78,372.92, 108,154.24 and 42,562.64 is: 58,736.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,372.92 : 108,154.24 = 42,562.64 : x
  2. Step 2: Convert to fraction form
    78,372.92/108,154.24 = 42,562.64/x
  3. Step 3: Cross multiply
    78,372.92x = 108,154.24 × 42,562.64
  4. Step 4: Simplify right side
    78,372.92x = 4,603,329,981.59
  5. Step 5: Solve for x
    x = 4,603,329,981.59/78,372.92
  6. Step 6: Final answer
    x = 58,736.23

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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.