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Finding the Fourth Proportional to 80,306.78, 120,328.74 and 48,620.79

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Solution

The fourth proportional to 80,306.78, 120,328.74 and 48,620.79 is: 72,851.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,306.78 : 120,328.74 = 48,620.79 : x
  2. Step 2: Convert to fraction form
    80,306.78/120,328.74 = 48,620.79/x
  3. Step 3: Cross multiply
    80,306.78x = 120,328.74 × 48,620.79
  4. Step 4: Simplify right side
    80,306.78x = 5,850,478,398.50
  5. Step 5: Solve for x
    x = 5,850,478,398.50/80,306.78
  6. Step 6: Final answer
    x = 72,851.62

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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.