Home / 85,857.12-128,785.68-26,696.52

Finding the Fourth Proportional to 85,857.12, 128,785.68 and 26,696.52

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Solution

The fourth proportional to 85,857.12, 128,785.68 and 26,696.52 is: 40,044.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,857.12 : 128,785.68 = 26,696.52 : x
  2. Step 2: Convert to fraction form
    85,857.12/128,785.68 = 26,696.52/x
  3. Step 3: Cross multiply
    85,857.12x = 128,785.68 × 26,696.52
  4. Step 4: Simplify right side
    85,857.12x = 3,438,129,481.83
  5. Step 5: Solve for x
    x = 3,438,129,481.83/85,857.12
  6. Step 6: Final answer
    x = 40,044.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.