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Finding the Fourth Proportional to 85,293.78, 127,874.61 and 57,168.78

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Solution

The fourth proportional to 85,293.78, 127,874.61 and 57,168.78 is: 85,708.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,293.78 : 127,874.61 = 57,168.78 : x
  2. Step 2: Convert to fraction form
    85,293.78/127,874.61 = 57,168.78/x
  3. Step 3: Cross multiply
    85,293.78x = 127,874.61 × 57,168.78
  4. Step 4: Simplify right side
    85,293.78x = 7,310,435,446.68
  5. Step 5: Solve for x
    x = 7,310,435,446.68/85,293.78
  6. Step 6: Final answer
    x = 85,708.89

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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.