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Finding the Fourth Proportional to 71,635.64, 107,474.92 and 28,919.06

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Solution

The fourth proportional to 71,635.64, 107,474.92 and 28,919.06 is: 43,387.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,635.64 : 107,474.92 = 28,919.06 : x
  2. Step 2: Convert to fraction form
    71,635.64/107,474.92 = 28,919.06/x
  3. Step 3: Cross multiply
    71,635.64x = 107,474.92 × 28,919.06
  4. Step 4: Simplify right side
    71,635.64x = 3,108,073,659.98
  5. Step 5: Solve for x
    x = 3,108,073,659.98/71,635.64
  6. Step 6: Final answer
    x = 43,387.25

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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.