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Finding the Fourth Proportional to 126,668.70, 174,787.44 and 72,971.10

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Solution

The fourth proportional to 126,668.70, 174,787.44 and 72,971.10 is: 100,691.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,668.70 : 174,787.44 = 72,971.10 : x
  2. Step 2: Convert to fraction form
    126,668.70/174,787.44 = 72,971.10/x
  3. Step 3: Cross multiply
    126,668.70x = 174,787.44 × 72,971.10
  4. Step 4: Simplify right side
    126,668.70x = 12,754,431,762.98
  5. Step 5: Solve for x
    x = 12,754,431,762.98/126,668.70
  6. Step 6: Final answer
    x = 100,691.27

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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.