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Finding the Fourth Proportional to 71,898.12, 99,254.52 and 55,728.96

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Solution

The fourth proportional to 71,898.12, 99,254.52 and 55,728.96 is: 76,933.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,898.12 : 99,254.52 = 55,728.96 : x
  2. Step 2: Convert to fraction form
    71,898.12/99,254.52 = 55,728.96/x
  3. Step 3: Cross multiply
    71,898.12x = 99,254.52 × 55,728.96
  4. Step 4: Simplify right side
    71,898.12x = 5,531,351,174.90
  5. Step 5: Solve for x
    x = 5,531,351,174.90/71,898.12
  6. Step 6: Final answer
    x = 76,933.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.