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Finding the Fourth Proportional to 129,409.70, 194,134.12 and 40,654.85

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Solution

The fourth proportional to 129,409.70, 194,134.12 and 40,654.85 is: 60,988.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,409.70 : 194,134.12 = 40,654.85 : x
  2. Step 2: Convert to fraction form
    129,409.70/194,134.12 = 40,654.85/x
  3. Step 3: Cross multiply
    129,409.70x = 194,134.12 × 40,654.85
  4. Step 4: Simplify right side
    129,409.70x = 7,892,492,456.17
  5. Step 5: Solve for x
    x = 7,892,492,456.17/129,409.70
  6. Step 6: Final answer
    x = 60,988.42

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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.