Home / 83,641.10-115,265.21-82,103.72

Finding the Fourth Proportional to 83,641.10, 115,265.21 and 82,103.72

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Solution

The fourth proportional to 83,641.10, 115,265.21 and 82,103.72 is: 113,146.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,641.10 : 115,265.21 = 82,103.72 : x
  2. Step 2: Convert to fraction form
    83,641.10/115,265.21 = 82,103.72/x
  3. Step 3: Cross multiply
    83,641.10x = 115,265.21 × 82,103.72
  4. Step 4: Simplify right side
    83,641.10x = 9,463,701,540.74
  5. Step 5: Solve for x
    x = 9,463,701,540.74/83,641.10
  6. Step 6: Final answer
    x = 113,146.55

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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.