Home / 83,680.32-115,495.20-51,863.36

Finding the Fourth Proportional to 83,680.32, 115,495.20 and 51,863.36

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Solution

The fourth proportional to 83,680.32, 115,495.20 and 51,863.36 is: 71,581.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,680.32 : 115,495.20 = 51,863.36 : x
  2. Step 2: Convert to fraction form
    83,680.32/115,495.20 = 51,863.36/x
  3. Step 3: Cross multiply
    83,680.32x = 115,495.20 × 51,863.36
  4. Step 4: Simplify right side
    83,680.32x = 5,989,969,135.87
  5. Step 5: Solve for x
    x = 5,989,969,135.87/83,680.32
  6. Step 6: Final answer
    x = 71,581.58

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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.