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Finding the Fourth Proportional to 103,888.44, 155,793.78 and 81,960.12

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Solution

The fourth proportional to 103,888.44, 155,793.78 and 81,960.12 is: 122,909.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,888.44 : 155,793.78 = 81,960.12 : x
  2. Step 2: Convert to fraction form
    103,888.44/155,793.78 = 81,960.12/x
  3. Step 3: Cross multiply
    103,888.44x = 155,793.78 × 81,960.12
  4. Step 4: Simplify right side
    103,888.44x = 12,768,876,904.05
  5. Step 5: Solve for x
    x = 12,768,876,904.05/103,888.44
  6. Step 6: Final answer
    x = 122,909.51

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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.