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Finding the Fourth Proportional to 72,318.80, 108,332.40 and 50,157.20

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Solution

The fourth proportional to 72,318.80, 108,332.40 and 50,157.20 is: 75,134.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,318.80 : 108,332.40 = 50,157.20 : x
  2. Step 2: Convert to fraction form
    72,318.80/108,332.40 = 50,157.20/x
  3. Step 3: Cross multiply
    72,318.80x = 108,332.40 × 50,157.20
  4. Step 4: Simplify right side
    72,318.80x = 5,433,649,853.28
  5. Step 5: Solve for x
    x = 5,433,649,853.28/72,318.80
  6. Step 6: Final answer
    x = 75,134.68

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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.