Home / 78,418.18-117,620.10-25,827.66

Finding the Fourth Proportional to 78,418.18, 117,620.10 and 25,827.66

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Solution

The fourth proportional to 78,418.18, 117,620.10 and 25,827.66 is: 38,739.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,418.18 : 117,620.10 = 25,827.66 : x
  2. Step 2: Convert to fraction form
    78,418.18/117,620.10 = 25,827.66/x
  3. Step 3: Cross multiply
    78,418.18x = 117,620.10 × 25,827.66
  4. Step 4: Simplify right side
    78,418.18x = 3,037,851,951.97
  5. Step 5: Solve for x
    x = 3,037,851,951.97/78,418.18
  6. Step 6: Final answer
    x = 38,739.13

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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.