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Finding the Fourth Proportional to 48,418.80, 72,613.80 and 18,819.60

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Solution

The fourth proportional to 48,418.80, 72,613.80 and 18,819.60 is: 28,223.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,418.80 : 72,613.80 = 18,819.60 : x
  2. Step 2: Convert to fraction form
    48,418.80/72,613.80 = 18,819.60/x
  3. Step 3: Cross multiply
    48,418.80x = 72,613.80 × 18,819.60
  4. Step 4: Simplify right side
    48,418.80x = 1,366,562,670.48
  5. Step 5: Solve for x
    x = 1,366,562,670.48/48,418.80
  6. Step 6: Final answer
    x = 28,223.80

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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.