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Finding the Fourth Proportional to 48,396.80, 72,560.88 and 18,789.68

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Solution

The fourth proportional to 48,396.80, 72,560.88 and 18,789.68 is: 28,171.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,396.80 : 72,560.88 = 18,789.68 : x
  2. Step 2: Convert to fraction form
    48,396.80/72,560.88 = 18,789.68/x
  3. Step 3: Cross multiply
    48,396.80x = 72,560.88 × 18,789.68
  4. Step 4: Simplify right side
    48,396.80x = 1,363,395,715.72
  5. Step 5: Solve for x
    x = 1,363,395,715.72/48,396.80
  6. Step 6: Final answer
    x = 28,171.20

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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.