Home / 87,079.12-130,515-60,640.72

Finding the Fourth Proportional to 87,079.12, 130,515 and 60,640.72

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Solution

The fourth proportional to 87,079.12, 130,515 and 60,640.72 is: 90,888.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,079.12 : 130,515 = 60,640.72 : x
  2. Step 2: Convert to fraction form
    87,079.12/130,515 = 60,640.72/x
  3. Step 3: Cross multiply
    87,079.12x = 130,515 × 60,640.72
  4. Step 4: Simplify right side
    87,079.12x = 7,914,523,570.80
  5. Step 5: Solve for x
    x = 7,914,523,570.80/87,079.12
  6. Step 6: Final answer
    x = 90,888.88

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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.