Home / 87,713.28-121,046.40-49,991.04

Finding the Fourth Proportional to 87,713.28, 121,046.40 and 49,991.04

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Solution

The fourth proportional to 87,713.28, 121,046.40 and 49,991.04 is: 68,988.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,713.28 : 121,046.40 = 49,991.04 : x
  2. Step 2: Convert to fraction form
    87,713.28/121,046.40 = 49,991.04/x
  3. Step 3: Cross multiply
    87,713.28x = 121,046.40 × 49,991.04
  4. Step 4: Simplify right side
    87,713.28x = 6,051,235,424.26
  5. Step 5: Solve for x
    x = 6,051,235,424.26/87,713.28
  6. Step 6: Final answer
    x = 68,988.82

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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.