Home / 129,757.80-194,247.90-77,140.20

Finding the Fourth Proportional to 129,757.80, 194,247.90 and 77,140.20

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Solution

The fourth proportional to 129,757.80, 194,247.90 and 77,140.20 is: 115,479.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,757.80 : 194,247.90 = 77,140.20 : x
  2. Step 2: Convert to fraction form
    129,757.80/194,247.90 = 77,140.20/x
  3. Step 3: Cross multiply
    129,757.80x = 194,247.90 × 77,140.20
  4. Step 4: Simplify right side
    129,757.80x = 14,984,321,855.58
  5. Step 5: Solve for x
    x = 14,984,321,855.58/129,757.80
  6. Step 6: Final answer
    x = 115,479.16

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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.