Home / 87,871.20-121,262.80-49,109.04

Finding the Fourth Proportional to 87,871.20, 121,262.80 and 49,109.04

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Solution

The fourth proportional to 87,871.20, 121,262.80 and 49,109.04 is: 67,770.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,871.20 : 121,262.80 = 49,109.04 : x
  2. Step 2: Convert to fraction form
    87,871.20/121,262.80 = 49,109.04/x
  3. Step 3: Cross multiply
    87,871.20x = 121,262.80 × 49,109.04
  4. Step 4: Simplify right side
    87,871.20x = 5,955,099,695.71
  5. Step 5: Solve for x
    x = 5,955,099,695.71/87,871.20
  6. Step 6: Final answer
    x = 67,770.78

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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.