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Finding the Fourth Proportional to 54,679.91, 81,990.70 and 28,319.27

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Solution

The fourth proportional to 54,679.91, 81,990.70 and 28,319.27 is: 42,463.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,679.91 : 81,990.70 = 28,319.27 : x
  2. Step 2: Convert to fraction form
    54,679.91/81,990.70 = 28,319.27/x
  3. Step 3: Cross multiply
    54,679.91x = 81,990.70 × 28,319.27
  4. Step 4: Simplify right side
    54,679.91x = 2,321,916,770.79
  5. Step 5: Solve for x
    x = 2,321,916,770.79/54,679.91
  6. Step 6: Final answer
    x = 42,463.80

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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.