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Finding the Fourth Proportional to 72,612.69, 108,961.67 and 30,489.53

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Solution

The fourth proportional to 72,612.69, 108,961.67 and 30,489.53 is: 45,752.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,612.69 : 108,961.67 = 30,489.53 : x
  2. Step 2: Convert to fraction form
    72,612.69/108,961.67 = 30,489.53/x
  3. Step 3: Cross multiply
    72,612.69x = 108,961.67 × 30,489.53
  4. Step 4: Simplify right side
    72,612.69x = 3,322,190,226.27
  5. Step 5: Solve for x
    x = 3,322,190,226.27/72,612.69
  6. Step 6: Final answer
    x = 45,752.20

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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.