Home / 260,865.20-391,427.40-103,098.80

Finding the Fourth Proportional to 260,865.20, 391,427.40 and 103,098.80

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Solution

The fourth proportional to 260,865.20, 391,427.40 and 103,098.80 is: 154,699.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,865.20 : 391,427.40 = 103,098.80 : x
  2. Step 2: Convert to fraction form
    260,865.20/391,427.40 = 103,098.80/x
  3. Step 3: Cross multiply
    260,865.20x = 391,427.40 × 103,098.80
  4. Step 4: Simplify right side
    260,865.20x = 40,355,695,227.12
  5. Step 5: Solve for x
    x = 40,355,695,227.12/260,865.20
  6. Step 6: Final answer
    x = 154,699.42

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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.