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Finding the Fourth Proportional to 48,339.20, 72,487.20 and 18,747.20

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Solution

The fourth proportional to 48,339.20, 72,487.20 and 18,747.20 is: 28,112.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,339.20 : 72,487.20 = 18,747.20 : x
  2. Step 2: Convert to fraction form
    48,339.20/72,487.20 = 18,747.20/x
  3. Step 3: Cross multiply
    48,339.20x = 72,487.20 × 18,747.20
  4. Step 4: Simplify right side
    48,339.20x = 1,358,932,035.84
  5. Step 5: Solve for x
    x = 1,358,932,035.84/48,339.20
  6. Step 6: Final answer
    x = 28,112.42

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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.