Home / 78,281.86-108,105.66-54,144.64

Finding the Fourth Proportional to 78,281.86, 108,105.66 and 54,144.64

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Solution

The fourth proportional to 78,281.86, 108,105.66 and 54,144.64 is: 74,772.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,281.86 : 108,105.66 = 54,144.64 : x
  2. Step 2: Convert to fraction form
    78,281.86/108,105.66 = 54,144.64/x
  3. Step 3: Cross multiply
    78,281.86x = 108,105.66 × 54,144.64
  4. Step 4: Simplify right side
    78,281.86x = 5,853,342,042.66
  5. Step 5: Solve for x
    x = 5,853,342,042.66/78,281.86
  6. Step 6: Final answer
    x = 74,772.65

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1.5x scale

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.