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Finding the Fourth Proportional to 260,872.37, 391,245.61 and 108,987.40

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Solution

The fourth proportional to 260,872.37, 391,245.61 and 108,987.40 is: 163,454.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,872.37 : 391,245.61 = 108,987.40 : x
  2. Step 2: Convert to fraction form
    260,872.37/391,245.61 = 108,987.40/x
  3. Step 3: Cross multiply
    260,872.37x = 391,245.61 × 108,987.40
  4. Step 4: Simplify right side
    260,872.37x = 42,640,841,089.67
  5. Step 5: Solve for x
    x = 42,640,841,089.67/260,872.37
  6. Step 6: Final answer
    x = 163,454.80

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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.