Home / 83,618.92-115,301.22-81,683.56

Finding the Fourth Proportional to 83,618.92, 115,301.22 and 81,683.56

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Solution

The fourth proportional to 83,618.92, 115,301.22 and 81,683.56 is: 112,632.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,618.92 : 115,301.22 = 81,683.56 : x
  2. Step 2: Convert to fraction form
    83,618.92/115,301.22 = 81,683.56/x
  3. Step 3: Cross multiply
    83,618.92x = 115,301.22 × 81,683.56
  4. Step 4: Simplify right side
    83,618.92x = 9,418,214,121.94
  5. Step 5: Solve for x
    x = 9,418,214,121.94/83,618.92
  6. Step 6: Final answer
    x = 112,632.57

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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.