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Finding the Fourth Proportional to 40,481.40, 60,722.10 and 30,639.90

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Solution

The fourth proportional to 40,481.40, 60,722.10 and 30,639.90 is: 45,959.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,481.40 : 60,722.10 = 30,639.90 : x
  2. Step 2: Convert to fraction form
    40,481.40/60,722.10 = 30,639.90/x
  3. Step 3: Cross multiply
    40,481.40x = 60,722.10 × 30,639.90
  4. Step 4: Simplify right side
    40,481.40x = 1,860,519,071.79
  5. Step 5: Solve for x
    x = 1,860,519,071.79/40,481.40
  6. Step 6: Final answer
    x = 45,959.85

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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.