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Finding the Fourth Proportional to 80,761.88, 121,147.68 and 25,357.88

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Solution

The fourth proportional to 80,761.88, 121,147.68 and 25,357.88 is: 38,038.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,761.88 : 121,147.68 = 25,357.88 : x
  2. Step 2: Convert to fraction form
    80,761.88/121,147.68 = 25,357.88/x
  3. Step 3: Cross multiply
    80,761.88x = 121,147.68 × 25,357.88
  4. Step 4: Simplify right side
    80,761.88x = 3,072,047,725.98
  5. Step 5: Solve for x
    x = 3,072,047,725.98/80,761.88
  6. Step 6: Final answer
    x = 38,038.34

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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.