Home / 87,689.01-121,010.68-47,402.80

Finding the Fourth Proportional to 87,689.01, 121,010.68 and 47,402.80

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Solution

The fourth proportional to 87,689.01, 121,010.68 and 47,402.80 is: 65,415.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,689.01 : 121,010.68 = 47,402.80 : x
  2. Step 2: Convert to fraction form
    87,689.01/121,010.68 = 47,402.80/x
  3. Step 3: Cross multiply
    87,689.01x = 121,010.68 × 47,402.80
  4. Step 4: Simplify right side
    87,689.01x = 5,736,245,061.90
  5. Step 5: Solve for x
    x = 5,736,245,061.90/87,689.01
  6. Step 6: Final answer
    x = 65,415.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.