Home / 87,626.88-120,981.60-78,179.04

Finding the Fourth Proportional to 87,626.88, 120,981.60 and 78,179.04

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Solution

The fourth proportional to 87,626.88, 120,981.60 and 78,179.04 is: 107,937.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,626.88 : 120,981.60 = 78,179.04 : x
  2. Step 2: Convert to fraction form
    87,626.88/120,981.60 = 78,179.04/x
  3. Step 3: Cross multiply
    87,626.88x = 120,981.60 × 78,179.04
  4. Step 4: Simplify right side
    87,626.88x = 9,458,225,345.66
  5. Step 5: Solve for x
    x = 9,458,225,345.66/87,626.88
  6. Step 6: Final answer
    x = 107,937.49

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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.