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Finding the Fourth Proportional to 85,138.91, 127,728.33 and 25,974.56

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Solution

The fourth proportional to 85,138.91, 127,728.33 and 25,974.56 is: 38,967.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,138.91 : 127,728.33 = 25,974.56 : x
  2. Step 2: Convert to fraction form
    85,138.91/127,728.33 = 25,974.56/x
  3. Step 3: Cross multiply
    85,138.91x = 127,728.33 × 25,974.56
  4. Step 4: Simplify right side
    85,138.91x = 3,317,686,532.64
  5. Step 5: Solve for x
    x = 3,317,686,532.64/85,138.91
  6. Step 6: Final answer
    x = 38,967.93

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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.