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Finding the Fourth Proportional to 87,760.62, 121,109.49 and 47,474.42

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Solution

The fourth proportional to 87,760.62, 121,109.49 and 47,474.42 is: 65,514.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,760.62 : 121,109.49 = 47,474.42 : x
  2. Step 2: Convert to fraction form
    87,760.62/121,109.49 = 47,474.42/x
  3. Step 3: Cross multiply
    87,760.62x = 121,109.49 × 47,474.42
  4. Step 4: Simplify right side
    87,760.62x = 5,749,602,188.70
  5. Step 5: Solve for x
    x = 5,749,602,188.70/87,760.62
  6. Step 6: Final answer
    x = 65,514.60

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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.