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Finding the Fourth Proportional to 71,343.72, 107,015.58 and 18,753.12

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Solution

The fourth proportional to 71,343.72, 107,015.58 and 18,753.12 is: 28,129.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,343.72 : 107,015.58 = 18,753.12 : x
  2. Step 2: Convert to fraction form
    71,343.72/107,015.58 = 18,753.12/x
  3. Step 3: Cross multiply
    71,343.72x = 107,015.58 × 18,753.12
  4. Step 4: Simplify right side
    71,343.72x = 2,006,876,013.61
  5. Step 5: Solve for x
    x = 2,006,876,013.61/71,343.72
  6. Step 6: Final answer
    x = 28,129.68

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1.5x scale

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.