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Finding the Fourth Proportional to 71,757.72, 107,649.90 and 21,842.28

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Solution

The fourth proportional to 71,757.72, 107,649.90 and 21,842.28 is: 32,767.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,757.72 : 107,649.90 = 21,842.28 : x
  2. Step 2: Convert to fraction form
    71,757.72/107,649.90 = 21,842.28/x
  3. Step 3: Cross multiply
    71,757.72x = 107,649.90 × 21,842.28
  4. Step 4: Simplify right side
    71,757.72x = 2,351,319,257.77
  5. Step 5: Solve for x
    x = 2,351,319,257.77/71,757.72
  6. Step 6: Final answer
    x = 32,767.47

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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.