Home / 260,875.53-391,337.78-80,962.65

Finding the Fourth Proportional to 260,875.53, 391,337.78 and 80,962.65

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Solution

The fourth proportional to 260,875.53, 391,337.78 and 80,962.65 is: 121,451.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,875.53 : 391,337.78 = 80,962.65 : x
  2. Step 2: Convert to fraction form
    260,875.53/391,337.78 = 80,962.65/x
  3. Step 3: Cross multiply
    260,875.53x = 391,337.78 × 80,962.65
  4. Step 4: Simplify right side
    260,875.53x = 31,683,743,309.10
  5. Step 5: Solve for x
    x = 31,683,743,309.10/260,875.53
  6. Step 6: Final answer
    x = 121,451.57

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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.