Home / 149,386.78-206,151.13-81,404.25

Finding the Fourth Proportional to 149,386.78, 206,151.13 and 81,404.25

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Solution

The fourth proportional to 149,386.78, 206,151.13 and 81,404.25 is: 112,336.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,386.78 : 206,151.13 = 81,404.25 : x
  2. Step 2: Convert to fraction form
    149,386.78/206,151.13 = 81,404.25/x
  3. Step 3: Cross multiply
    149,386.78x = 206,151.13 × 81,404.25
  4. Step 4: Simplify right side
    149,386.78x = 16,781,578,124.30
  5. Step 5: Solve for x
    x = 16,781,578,124.30/149,386.78
  6. Step 6: Final answer
    x = 112,336.43

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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.