Home / 78,279.20-108,025.32-42,469.76

Finding the Fourth Proportional to 78,279.20, 108,025.32 and 42,469.76

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Solution

The fourth proportional to 78,279.20, 108,025.32 and 42,469.76 is: 58,608.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,279.20 : 108,025.32 = 42,469.76 : x
  2. Step 2: Convert to fraction form
    78,279.20/108,025.32 = 42,469.76/x
  3. Step 3: Cross multiply
    78,279.20x = 108,025.32 × 42,469.76
  4. Step 4: Simplify right side
    78,279.20x = 4,587,809,414.32
  5. Step 5: Solve for x
    x = 4,587,809,414.32/78,279.20
  6. Step 6: Final answer
    x = 58,608.28

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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.