Home / 87,537.80-131,306.70-78,680.45

Finding the Fourth Proportional to 87,537.80, 131,306.70 and 78,680.45

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Solution

The fourth proportional to 87,537.80, 131,306.70 and 78,680.45 is: 118,020.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,537.80 : 131,306.70 = 78,680.45 : x
  2. Step 2: Convert to fraction form
    87,537.80/131,306.70 = 78,680.45/x
  3. Step 3: Cross multiply
    87,537.80x = 131,306.70 × 78,680.45
  4. Step 4: Simplify right side
    87,537.80x = 10,331,270,244.02
  5. Step 5: Solve for x
    x = 10,331,270,244.02/87,537.80
  6. Step 6: Final answer
    x = 118,020.68

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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.