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Finding the Fourth Proportional to 126,640.56, 174,721.53 and 72,924.42

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Solution

The fourth proportional to 126,640.56, 174,721.53 and 72,924.42 is: 100,611.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,640.56 : 174,721.53 = 72,924.42 : x
  2. Step 2: Convert to fraction form
    126,640.56/174,721.53 = 72,924.42/x
  3. Step 3: Cross multiply
    126,640.56x = 174,721.53 × 72,924.42
  4. Step 4: Simplify right side
    126,640.56x = 12,741,466,236.76
  5. Step 5: Solve for x
    x = 12,741,466,236.76/126,640.56
  6. Step 6: Final answer
    x = 100,611.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.