Home / 78,505.97-108,337.19-42,695.21

Finding the Fourth Proportional to 78,505.97, 108,337.19 and 42,695.21

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Solution

The fourth proportional to 78,505.97, 108,337.19 and 42,695.21 is: 58,918.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,505.97 : 108,337.19 = 42,695.21 : x
  2. Step 2: Convert to fraction form
    78,505.97/108,337.19 = 42,695.21/x
  3. Step 3: Cross multiply
    78,505.97x = 108,337.19 × 42,695.21
  4. Step 4: Simplify right side
    78,505.97x = 4,625,478,322.70
  5. Step 5: Solve for x
    x = 4,625,478,322.70/78,505.97
  6. Step 6: Final answer
    x = 58,918.81

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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.