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Finding the Fourth Proportional to 129,937.80, 194,906.70 and 108,942.60

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Solution

The fourth proportional to 129,937.80, 194,906.70 and 108,942.60 is: 163,413.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,937.80 : 194,906.70 = 108,942.60 : x
  2. Step 2: Convert to fraction form
    129,937.80/194,906.70 = 108,942.60/x
  3. Step 3: Cross multiply
    129,937.80x = 194,906.70 × 108,942.60
  4. Step 4: Simplify right side
    129,937.80x = 21,233,642,655.42
  5. Step 5: Solve for x
    x = 21,233,642,655.42/129,937.80
  6. Step 6: Final answer
    x = 163,413.90

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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.