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Finding the Fourth Proportional to 48,759.70, 73,139.55 and 13,705.30

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Solution

The fourth proportional to 48,759.70, 73,139.55 and 13,705.30 is: 20,557.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,759.70 : 73,139.55 = 13,705.30 : x
  2. Step 2: Convert to fraction form
    48,759.70/73,139.55 = 13,705.30/x
  3. Step 3: Cross multiply
    48,759.70x = 73,139.55 × 13,705.30
  4. Step 4: Simplify right side
    48,759.70x = 1,002,399,474.62
  5. Step 5: Solve for x
    x = 1,002,399,474.62/48,759.70
  6. Step 6: Final answer
    x = 20,557.95

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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.