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Finding the Fourth Proportional to 85,854.26, 128,789.60 and 26,674.04

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Solution

The fourth proportional to 85,854.26, 128,789.60 and 26,674.04 is: 40,013.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,854.26 : 128,789.60 = 26,674.04 : x
  2. Step 2: Convert to fraction form
    85,854.26/128,789.60 = 26,674.04/x
  3. Step 3: Cross multiply
    85,854.26x = 128,789.60 × 26,674.04
  4. Step 4: Simplify right side
    85,854.26x = 3,435,339,130.59
  5. Step 5: Solve for x
    x = 3,435,339,130.59/85,854.26
  6. Step 6: Final answer
    x = 40,013.61

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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.