Home / 87,402.32-130,986.36-81,803.60

Finding the Fourth Proportional to 87,402.32, 130,986.36 and 81,803.60

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Solution

The fourth proportional to 87,402.32, 130,986.36 and 81,803.60 is: 122,595.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,402.32 : 130,986.36 = 81,803.60 : x
  2. Step 2: Convert to fraction form
    87,402.32/130,986.36 = 81,803.60/x
  3. Step 3: Cross multiply
    87,402.32x = 130,986.36 × 81,803.60
  4. Step 4: Simplify right side
    87,402.32x = 10,715,155,798.90
  5. Step 5: Solve for x
    x = 10,715,155,798.90/87,402.32
  6. Step 6: Final answer
    x = 122,595.78

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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.