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Finding the Fourth Proportional to 71,672.72, 107,513.19 and 21,754.45

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Solution

The fourth proportional to 71,672.72, 107,513.19 and 21,754.45 is: 32,632.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,672.72 : 107,513.19 = 21,754.45 : x
  2. Step 2: Convert to fraction form
    71,672.72/107,513.19 = 21,754.45/x
  3. Step 3: Cross multiply
    71,672.72x = 107,513.19 × 21,754.45
  4. Step 4: Simplify right side
    71,672.72x = 2,338,890,316.20
  5. Step 5: Solve for x
    x = 2,338,890,316.20/71,672.72
  6. Step 6: Final answer
    x = 32,632.92

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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.