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Finding the Fourth Proportional to 72,753.30, 109,129.95 and 71,586.90

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Solution

The fourth proportional to 72,753.30, 109,129.95 and 71,586.90 is: 107,380.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,753.30 : 109,129.95 = 71,586.90 : x
  2. Step 2: Convert to fraction form
    72,753.30/109,129.95 = 71,586.90/x
  3. Step 3: Cross multiply
    72,753.30x = 109,129.95 × 71,586.90
  4. Step 4: Simplify right side
    72,753.30x = 7,812,274,817.66
  5. Step 5: Solve for x
    x = 7,812,274,817.66/72,753.30
  6. Step 6: Final answer
    x = 107,380.35

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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.