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Finding the Fourth Proportional to 85,135.70, 127,717.58 and 25,957.54

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Solution

The fourth proportional to 85,135.70, 127,717.58 and 25,957.54 is: 38,940.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,135.70 : 127,717.58 = 25,957.54 : x
  2. Step 2: Convert to fraction form
    85,135.70/127,717.58 = 25,957.54/x
  3. Step 3: Cross multiply
    85,135.70x = 127,717.58 × 25,957.54
  4. Step 4: Simplify right side
    85,135.70x = 3,315,234,191.55
  5. Step 5: Solve for x
    x = 3,315,234,191.55/85,135.70
  6. Step 6: Final answer
    x = 38,940.59

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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.