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Finding the Fourth Proportional to 260,867.70, 391,301.55 and 73,879.20

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Solution

The fourth proportional to 260,867.70, 391,301.55 and 73,879.20 is: 110,818.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,867.70 : 391,301.55 = 73,879.20 : x
  2. Step 2: Convert to fraction form
    260,867.70/391,301.55 = 73,879.20/x
  3. Step 3: Cross multiply
    260,867.70x = 391,301.55 × 73,879.20
  4. Step 4: Simplify right side
    260,867.70x = 28,909,045,472.76
  5. Step 5: Solve for x
    x = 28,909,045,472.76/260,867.70
  6. Step 6: Final answer
    x = 110,818.80

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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.