Home / 87,211.20-130,525.20-76,713.60

Finding the Fourth Proportional to 87,211.20, 130,525.20 and 76,713.60

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Solution

The fourth proportional to 87,211.20, 130,525.20 and 76,713.60 is: 114,813.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,211.20 : 130,525.20 = 76,713.60 : x
  2. Step 2: Convert to fraction form
    87,211.20/130,525.20 = 76,713.60/x
  3. Step 3: Cross multiply
    87,211.20x = 130,525.20 × 76,713.60
  4. Step 4: Simplify right side
    87,211.20x = 10,013,057,982.72
  5. Step 5: Solve for x
    x = 10,013,057,982.72/87,211.20
  6. Step 6: Final answer
    x = 114,813.90

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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.