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Finding the Fourth Proportional to 67,654.53, 101,469.90 and 20,907.81

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Solution

The fourth proportional to 67,654.53, 101,469.90 and 20,907.81 is: 31,358.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,654.53 : 101,469.90 = 20,907.81 : x
  2. Step 2: Convert to fraction form
    67,654.53/101,469.90 = 20,907.81/x
  3. Step 3: Cross multiply
    67,654.53x = 101,469.90 × 20,907.81
  4. Step 4: Simplify right side
    67,654.53x = 2,121,513,389.92
  5. Step 5: Solve for x
    x = 2,121,513,389.92/67,654.53
  6. Step 6: Final answer
    x = 31,358.04

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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.