Home / 87,127.20-130,399.20-76,629.60

Finding the Fourth Proportional to 87,127.20, 130,399.20 and 76,629.60

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Solution

The fourth proportional to 87,127.20, 130,399.20 and 76,629.60 is: 114,687.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,127.20 : 130,399.20 = 76,629.60 : x
  2. Step 2: Convert to fraction form
    87,127.20/130,399.20 = 76,629.60/x
  3. Step 3: Cross multiply
    87,127.20x = 130,399.20 × 76,629.60
  4. Step 4: Simplify right side
    87,127.20x = 9,992,438,536.32
  5. Step 5: Solve for x
    x = 9,992,438,536.32/87,127.20
  6. Step 6: Final answer
    x = 114,687.93

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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.