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Finding the Fourth Proportional to 72,710.80, 109,062.96 and 25,336.64

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Solution

The fourth proportional to 72,710.80, 109,062.96 and 25,336.64 is: 38,003.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,710.80 : 109,062.96 = 25,336.64 : x
  2. Step 2: Convert to fraction form
    72,710.80/109,062.96 = 25,336.64/x
  3. Step 3: Cross multiply
    72,710.80x = 109,062.96 × 25,336.64
  4. Step 4: Simplify right side
    72,710.80x = 2,763,288,954.85
  5. Step 5: Solve for x
    x = 2,763,288,954.85/72,710.80
  6. Step 6: Final answer
    x = 38,003.83

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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.