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Finding the Fourth Proportional to 260,876.80, 391,263.88 and 83,335.96

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Solution

The fourth proportional to 260,876.80, 391,263.88 and 83,335.96 is: 124,987.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,876.80 : 391,263.88 = 83,335.96 : x
  2. Step 2: Convert to fraction form
    260,876.80/391,263.88 = 83,335.96/x
  3. Step 3: Cross multiply
    260,876.80x = 391,263.88 × 83,335.96
  4. Step 4: Simplify right side
    260,876.80x = 32,606,351,053.12
  5. Step 5: Solve for x
    x = 32,606,351,053.12/260,876.80
  6. Step 6: Final answer
    x = 124,987.55

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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.