Home / 149,387.21-206,151.66-81,404.76

Finding the Fourth Proportional to 149,387.21, 206,151.66 and 81,404.76

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Solution

The fourth proportional to 149,387.21, 206,151.66 and 81,404.76 is: 112,337.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,387.21 : 206,151.66 = 81,404.76 : x
  2. Step 2: Convert to fraction form
    149,387.21/206,151.66 = 81,404.76/x
  3. Step 3: Cross multiply
    149,387.21x = 206,151.66 × 81,404.76
  4. Step 4: Simplify right side
    149,387.21x = 16,781,726,405.90
  5. Step 5: Solve for x
    x = 16,781,726,405.90/149,387.21
  6. Step 6: Final answer
    x = 112,337.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.