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Finding the Fourth Proportional to 115,662.76, 159,624.90 and 72,672.04

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Solution

The fourth proportional to 115,662.76, 159,624.90 and 72,672.04 is: 100,293.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,662.76 : 159,624.90 = 72,672.04 : x
  2. Step 2: Convert to fraction form
    115,662.76/159,624.90 = 72,672.04/x
  3. Step 3: Cross multiply
    115,662.76x = 159,624.90 × 72,672.04
  4. Step 4: Simplify right side
    115,662.76x = 11,600,267,117.80
  5. Step 5: Solve for x
    x = 11,600,267,117.80/115,662.76
  6. Step 6: Final answer
    x = 100,293.88

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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.