Home / 129,619.20-194,428.80-40,899.90

Finding the Fourth Proportional to 129,619.20, 194,428.80 and 40,899.90

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Solution

The fourth proportional to 129,619.20, 194,428.80 and 40,899.90 is: 61,349.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,619.20 : 194,428.80 = 40,899.90 : x
  2. Step 2: Convert to fraction form
    129,619.20/194,428.80 = 40,899.90/x
  3. Step 3: Cross multiply
    129,619.20x = 194,428.80 × 40,899.90
  4. Step 4: Simplify right side
    129,619.20x = 7,952,118,477.12
  5. Step 5: Solve for x
    x = 7,952,118,477.12/129,619.20
  6. Step 6: Final answer
    x = 61,349.85

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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.