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Finding the Fourth Proportional to 260,706.86, 391,102.67 and 80,750.25

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Solution

The fourth proportional to 260,706.86, 391,102.67 and 80,750.25 is: 121,138.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,706.86 : 391,102.67 = 80,750.25 : x
  2. Step 2: Convert to fraction form
    260,706.86/391,102.67 = 80,750.25/x
  3. Step 3: Cross multiply
    260,706.86x = 391,102.67 × 80,750.25
  4. Step 4: Simplify right side
    260,706.86x = 31,581,637,974.42
  5. Step 5: Solve for x
    x = 31,581,637,974.42/260,706.86
  6. Step 6: Final answer
    x = 121,138.50

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1.5x scale

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.