Home / 78,403.27-117,838.19-36,879.43

Finding the Fourth Proportional to 78,403.27, 117,838.19 and 36,879.43

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Solution

The fourth proportional to 78,403.27, 117,838.19 and 36,879.43 is: 55,428.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,403.27 : 117,838.19 = 36,879.43 : x
  2. Step 2: Convert to fraction form
    78,403.27/117,838.19 = 36,879.43/x
  3. Step 3: Cross multiply
    78,403.27x = 117,838.19 × 36,879.43
  4. Step 4: Simplify right side
    78,403.27x = 4,345,805,279.43
  5. Step 5: Solve for x
    x = 4,345,805,279.43/78,403.27
  6. Step 6: Final answer
    x = 55,428.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.