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Finding the Fourth Proportional to 80,652.31, 120,624.76 and 71,829.88

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Solution

The fourth proportional to 80,652.31, 120,624.76 and 71,829.88 is: 107,429.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,652.31 : 120,624.76 = 71,829.88 : x
  2. Step 2: Convert to fraction form
    80,652.31/120,624.76 = 71,829.88/x
  3. Step 3: Cross multiply
    80,652.31x = 120,624.76 × 71,829.88
  4. Step 4: Simplify right side
    80,652.31x = 8,664,462,035.83
  5. Step 5: Solve for x
    x = 8,664,462,035.83/80,652.31
  6. Step 6: Final answer
    x = 107,429.81

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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.