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Finding the Fourth Proportional to 71,510.52, 107,270.91 and 18,919.38

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Solution

The fourth proportional to 71,510.52, 107,270.91 and 18,919.38 is: 28,380.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,510.52 : 107,270.91 = 18,919.38 : x
  2. Step 2: Convert to fraction form
    71,510.52/107,270.91 = 18,919.38/x
  3. Step 3: Cross multiply
    71,510.52x = 107,270.91 × 18,919.38
  4. Step 4: Simplify right side
    71,510.52x = 2,029,499,109.24
  5. Step 5: Solve for x
    x = 2,029,499,109.24/71,510.52
  6. Step 6: Final answer
    x = 28,380.43

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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.