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Finding the Fourth Proportional to 129,863.80, 194,406.90 and 77,246.20

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Solution

The fourth proportional to 129,863.80, 194,406.90 and 77,246.20 is: 115,638.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,863.80 : 194,406.90 = 77,246.20 : x
  2. Step 2: Convert to fraction form
    129,863.80/194,406.90 = 77,246.20/x
  3. Step 3: Cross multiply
    129,863.80x = 194,406.90 × 77,246.20
  4. Step 4: Simplify right side
    129,863.80x = 15,017,194,278.78
  5. Step 5: Solve for x
    x = 15,017,194,278.78/129,863.80
  6. Step 6: Final answer
    x = 115,638.03

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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.