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Finding the Fourth Proportional to 87,615.78, 120,909.67 and 47,329.54

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Solution

The fourth proportional to 87,615.78, 120,909.67 and 47,329.54 is: 65,314.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,615.78 : 120,909.67 = 47,329.54 : x
  2. Step 2: Convert to fraction form
    87,615.78/120,909.67 = 47,329.54/x
  3. Step 3: Cross multiply
    87,615.78x = 120,909.67 × 47,329.54
  4. Step 4: Simplify right side
    87,615.78x = 5,722,599,062.65
  5. Step 5: Solve for x
    x = 5,722,599,062.65/87,615.78
  6. Step 6: Final answer
    x = 65,314.71

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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.