Home / 87,520.67-120,729.89-57,354.65

Finding the Fourth Proportional to 87,520.67, 120,729.89 and 57,354.65

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Solution

The fourth proportional to 87,520.67, 120,729.89 and 57,354.65 is: 79,117.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,520.67 : 120,729.89 = 57,354.65 : x
  2. Step 2: Convert to fraction form
    87,520.67/120,729.89 = 57,354.65/x
  3. Step 3: Cross multiply
    87,520.67x = 120,729.89 × 57,354.65
  4. Step 4: Simplify right side
    87,520.67x = 6,924,419,695.07
  5. Step 5: Solve for x
    x = 6,924,419,695.07/87,520.67
  6. Step 6: Final answer
    x = 79,117.54

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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.