Home / 87,138.72-130,749.12-60,525.60

Finding the Fourth Proportional to 87,138.72, 130,749.12 and 60,525.60

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Solution

The fourth proportional to 87,138.72, 130,749.12 and 60,525.60 is: 90,816.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,138.72 : 130,749.12 = 60,525.60 : x
  2. Step 2: Convert to fraction form
    87,138.72/130,749.12 = 60,525.60/x
  3. Step 3: Cross multiply
    87,138.72x = 130,749.12 × 60,525.60
  4. Step 4: Simplify right side
    87,138.72x = 7,913,668,937.47
  5. Step 5: Solve for x
    x = 7,913,668,937.47/87,138.72
  6. Step 6: Final answer
    x = 90,816.91

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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.