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Finding the Fourth Proportional to 79,043.20, 109,081.48 and 45,054.85

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Solution

The fourth proportional to 79,043.20, 109,081.48 and 45,054.85 is: 62,176.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,043.20 : 109,081.48 = 45,054.85 : x
  2. Step 2: Convert to fraction form
    79,043.20/109,081.48 = 45,054.85/x
  3. Step 3: Cross multiply
    79,043.20x = 109,081.48 × 45,054.85
  4. Step 4: Simplify right side
    79,043.20x = 4,914,649,719.18
  5. Step 5: Solve for x
    x = 4,914,649,719.18/79,043.20
  6. Step 6: Final answer
    x = 62,176.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.