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Finding the Fourth Proportional to 72,079.53, 108,119.02 and 19,489

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Solution

The fourth proportional to 72,079.53, 108,119.02 and 19,489 is: 29,233.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,079.53 : 108,119.02 = 19,489 : x
  2. Step 2: Convert to fraction form
    72,079.53/108,119.02 = 19,489/x
  3. Step 3: Cross multiply
    72,079.53x = 108,119.02 × 19,489
  4. Step 4: Simplify right side
    72,079.53x = 2,107,131,580.78
  5. Step 5: Solve for x
    x = 2,107,131,580.78/72,079.53
  6. Step 6: Final answer
    x = 29,233.43

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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.