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Finding the Fourth Proportional to 78,080.80, 117,129.20 and 25,494.24

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Solution

The fourth proportional to 78,080.80, 117,129.20 and 25,494.24 is: 38,243.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,080.80 : 117,129.20 = 25,494.24 : x
  2. Step 2: Convert to fraction form
    78,080.80/117,129.20 = 25,494.24/x
  3. Step 3: Cross multiply
    78,080.80x = 117,129.20 × 25,494.24
  4. Step 4: Simplify right side
    78,080.80x = 2,986,119,935.81
  5. Step 5: Solve for x
    x = 2,986,119,935.81/78,080.80
  6. Step 6: Final answer
    x = 38,243.97

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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.