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Finding the Fourth Proportional to 76,869.44, 115,468.05 and 72,375.15

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Solution

The fourth proportional to 76,869.44, 115,468.05 and 72,375.15 is: 108,717.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,869.44 : 115,468.05 = 72,375.15 : x
  2. Step 2: Convert to fraction form
    76,869.44/115,468.05 = 72,375.15/x
  3. Step 3: Cross multiply
    76,869.44x = 115,468.05 × 72,375.15
  4. Step 4: Simplify right side
    76,869.44x = 8,357,017,077.08
  5. Step 5: Solve for x
    x = 8,357,017,077.08/76,869.44
  6. Step 6: Final answer
    x = 108,717.04

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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.