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Finding the Fourth Proportional to 92,385.68, 138,695.16 and 52,978.64

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Solution

The fourth proportional to 92,385.68, 138,695.16 and 52,978.64 is: 79,534.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,385.68 : 138,695.16 = 52,978.64 : x
  2. Step 2: Convert to fraction form
    92,385.68/138,695.16 = 52,978.64/x
  3. Step 3: Cross multiply
    92,385.68x = 138,695.16 × 52,978.64
  4. Step 4: Simplify right side
    92,385.68x = 7,347,880,951.38
  5. Step 5: Solve for x
    x = 7,347,880,951.38/92,385.68
  6. Step 6: Final answer
    x = 79,534.85

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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.