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Finding the Fourth Proportional to 129,660.95, 194,491.46 and 40,921.40

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Solution

The fourth proportional to 129,660.95, 194,491.46 and 40,921.40 is: 61,382.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,660.95 : 194,491.46 = 40,921.40 : x
  2. Step 2: Convert to fraction form
    129,660.95/194,491.46 = 40,921.40/x
  3. Step 3: Cross multiply
    129,660.95x = 194,491.46 × 40,921.40
  4. Step 4: Simplify right side
    129,660.95x = 7,958,861,654.18
  5. Step 5: Solve for x
    x = 7,958,861,654.18/129,660.95
  6. Step 6: Final answer
    x = 61,382.10

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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.