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Finding the Fourth Proportional to 71,756.72, 107,648.40 and 21,841.28

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Solution

The fourth proportional to 71,756.72, 107,648.40 and 21,841.28 is: 32,765.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,756.72 : 107,648.40 = 21,841.28 : x
  2. Step 2: Convert to fraction form
    71,756.72/107,648.40 = 21,841.28/x
  3. Step 3: Cross multiply
    71,756.72x = 107,648.40 × 21,841.28
  4. Step 4: Simplify right side
    71,756.72x = 2,351,178,845.95
  5. Step 5: Solve for x
    x = 2,351,178,845.95/71,756.72
  6. Step 6: Final answer
    x = 32,765.97

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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.