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Finding the Fourth Proportional to 84,842.78, 127,247.70 and 25,664.60

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Solution

The fourth proportional to 84,842.78, 127,247.70 and 25,664.60 is: 38,491.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,842.78 : 127,247.70 = 25,664.60 : x
  2. Step 2: Convert to fraction form
    84,842.78/127,247.70 = 25,664.60/x
  3. Step 3: Cross multiply
    84,842.78x = 127,247.70 × 25,664.60
  4. Step 4: Simplify right side
    84,842.78x = 3,265,761,321.42
  5. Step 5: Solve for x
    x = 3,265,761,321.42/84,842.78
  6. Step 6: Final answer
    x = 38,491.92

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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.