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Finding the Fourth Proportional to 71,672.76, 107,530.90 and 28,956.28

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Solution

The fourth proportional to 71,672.76, 107,530.90 and 28,956.28 is: 43,443.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,672.76 : 107,530.90 = 28,956.28 : x
  2. Step 2: Convert to fraction form
    71,672.76/107,530.90 = 28,956.28/x
  3. Step 3: Cross multiply
    71,672.76x = 107,530.90 × 28,956.28
  4. Step 4: Simplify right side
    71,672.76x = 3,113,694,849.05
  5. Step 5: Solve for x
    x = 3,113,694,849.05/71,672.76
  6. Step 6: Final answer
    x = 43,443.21

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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.