Home / 78,579.90-108,442.35-48,382.95

Finding the Fourth Proportional to 78,579.90, 108,442.35 and 48,382.95

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Solution

The fourth proportional to 78,579.90, 108,442.35 and 48,382.95 is: 66,769.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,579.90 : 108,442.35 = 48,382.95 : x
  2. Step 2: Convert to fraction form
    78,579.90/108,442.35 = 48,382.95/x
  3. Step 3: Cross multiply
    78,579.90x = 108,442.35 × 48,382.95
  4. Step 4: Simplify right side
    78,579.90x = 5,246,760,797.93
  5. Step 5: Solve for x
    x = 5,246,760,797.93/78,579.90
  6. Step 6: Final answer
    x = 66,769.76

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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.