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Finding the Fourth Proportional to 79,976.64, 110,286.08 and 48,139.20

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Solution

The fourth proportional to 79,976.64, 110,286.08 and 48,139.20 is: 66,382.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,976.64 : 110,286.08 = 48,139.20 : x
  2. Step 2: Convert to fraction form
    79,976.64/110,286.08 = 48,139.20/x
  3. Step 3: Cross multiply
    79,976.64x = 110,286.08 × 48,139.20
  4. Step 4: Simplify right side
    79,976.64x = 5,309,083,662.34
  5. Step 5: Solve for x
    x = 5,309,083,662.34/79,976.64
  6. Step 6: Final answer
    x = 66,382.93

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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.