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Finding the Fourth Proportional to 129,939.80, 194,909.70 and 108,944.60

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Solution

The fourth proportional to 129,939.80, 194,909.70 and 108,944.60 is: 163,416.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,939.80 : 194,909.70 = 108,944.60 : x
  2. Step 2: Convert to fraction form
    129,939.80/194,909.70 = 108,944.60/x
  3. Step 3: Cross multiply
    129,939.80x = 194,909.70 × 108,944.60
  4. Step 4: Simplify right side
    129,939.80x = 21,234,359,302.62
  5. Step 5: Solve for x
    x = 21,234,359,302.62/129,939.80
  6. Step 6: Final answer
    x = 163,416.90

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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.