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Finding the Fourth Proportional to 78,337.46, 108,108 and 42,529.76

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Solution

The fourth proportional to 78,337.46, 108,108 and 42,529.76 is: 58,692.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,337.46 : 108,108 = 42,529.76 : x
  2. Step 2: Convert to fraction form
    78,337.46/108,108 = 42,529.76/x
  3. Step 3: Cross multiply
    78,337.46x = 108,108 × 42,529.76
  4. Step 4: Simplify right side
    78,337.46x = 4,597,807,294.08
  5. Step 5: Solve for x
    x = 4,597,807,294.08/78,337.46
  6. Step 6: Final answer
    x = 58,692.32

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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.