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Finding the Fourth Proportional to 252,920.70, 379,271.70 and 126,512.10

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Solution

The fourth proportional to 252,920.70, 379,271.70 and 126,512.10 is: 189,713.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,920.70 : 379,271.70 = 126,512.10 : x
  2. Step 2: Convert to fraction form
    252,920.70/379,271.70 = 126,512.10/x
  3. Step 3: Cross multiply
    252,920.70x = 379,271.70 × 126,512.10
  4. Step 4: Simplify right side
    252,920.70x = 47,982,459,237.57
  5. Step 5: Solve for x
    x = 47,982,459,237.57/252,920.70
  6. Step 6: Final answer
    x = 189,713.45

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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.