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Finding the Fourth Proportional to 79,993.76, 120,056.25 and 40,562.15

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Solution

The fourth proportional to 79,993.76, 120,056.25 and 40,562.15 is: 60,876.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,993.76 : 120,056.25 = 40,562.15 : x
  2. Step 2: Convert to fraction form
    79,993.76/120,056.25 = 40,562.15/x
  3. Step 3: Cross multiply
    79,993.76x = 120,056.25 × 40,562.15
  4. Step 4: Simplify right side
    79,993.76x = 4,869,739,020.66
  5. Step 5: Solve for x
    x = 4,869,739,020.66/79,993.76
  6. Step 6: Final answer
    x = 60,876.49

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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.