Home / 135,324.10-186,781.05-81,640.90

Finding the Fourth Proportional to 135,324.10, 186,781.05 and 81,640.90

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Solution

The fourth proportional to 135,324.10, 186,781.05 and 81,640.90 is: 112,684.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,324.10 : 186,781.05 = 81,640.90 : x
  2. Step 2: Convert to fraction form
    135,324.10/186,781.05 = 81,640.90/x
  3. Step 3: Cross multiply
    135,324.10x = 186,781.05 × 81,640.90
  4. Step 4: Simplify right side
    135,324.10x = 15,248,973,024.95
  5. Step 5: Solve for x
    x = 15,248,973,024.95/135,324.10
  6. Step 6: Final answer
    x = 112,684.83

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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.