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Finding the Fourth Proportional to 72,672.75, 108,996.53 and 20,068.11

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Solution

The fourth proportional to 72,672.75, 108,996.53 and 20,068.11 is: 30,098.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,672.75 : 108,996.53 = 20,068.11 : x
  2. Step 2: Convert to fraction form
    72,672.75/108,996.53 = 20,068.11/x
  3. Step 3: Cross multiply
    72,672.75x = 108,996.53 × 20,068.11
  4. Step 4: Simplify right side
    72,672.75x = 2,187,354,253.32
  5. Step 5: Solve for x
    x = 2,187,354,253.32/72,672.75
  6. Step 6: Final answer
    x = 30,098.69

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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.