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Finding the Fourth Proportional to 84,660.75, 126,974.86 and 42,529.55

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Solution

The fourth proportional to 84,660.75, 126,974.86 and 42,529.55 is: 63,786.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,660.75 : 126,974.86 = 42,529.55 : x
  2. Step 2: Convert to fraction form
    84,660.75/126,974.86 = 42,529.55/x
  3. Step 3: Cross multiply
    84,660.75x = 126,974.86 × 42,529.55
  4. Step 4: Simplify right side
    84,660.75x = 5,400,182,915.91
  5. Step 5: Solve for x
    x = 5,400,182,915.91/84,660.75
  6. Step 6: Final answer
    x = 63,786.15

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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.