Home / 259,105.50-388,658.25-72,121.86

Finding the Fourth Proportional to 259,105.50, 388,658.25 and 72,121.86

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Solution

The fourth proportional to 259,105.50, 388,658.25 and 72,121.86 is: 108,182.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,105.50 : 388,658.25 = 72,121.86 : x
  2. Step 2: Convert to fraction form
    259,105.50/388,658.25 = 72,121.86/x
  3. Step 3: Cross multiply
    259,105.50x = 388,658.25 × 72,121.86
  4. Step 4: Simplify right side
    259,105.50x = 28,030,755,894.35
  5. Step 5: Solve for x
    x = 28,030,755,894.35/259,105.50
  6. Step 6: Final answer
    x = 108,182.79

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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.