Home / 78,414.27-117,854.69-36,890.43

Finding the Fourth Proportional to 78,414.27, 117,854.69 and 36,890.43

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Solution

The fourth proportional to 78,414.27, 117,854.69 and 36,890.43 is: 55,445.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,414.27 : 117,854.69 = 36,890.43 : x
  2. Step 2: Convert to fraction form
    78,414.27/117,854.69 = 36,890.43/x
  3. Step 3: Cross multiply
    78,414.27x = 117,854.69 × 36,890.43
  4. Step 4: Simplify right side
    78,414.27x = 4,347,710,007.16
  5. Step 5: Solve for x
    x = 4,347,710,007.16/78,414.27
  6. Step 6: Final answer
    x = 55,445.39

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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.