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Finding the Fourth Proportional to 252,002.40, 378,003.60 and 126,031.20

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Solution

The fourth proportional to 252,002.40, 378,003.60 and 126,031.20 is: 189,046.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,002.40 : 378,003.60 = 126,031.20 : x
  2. Step 2: Convert to fraction form
    252,002.40/378,003.60 = 126,031.20/x
  3. Step 3: Cross multiply
    252,002.40x = 378,003.60 × 126,031.20
  4. Step 4: Simplify right side
    252,002.40x = 47,640,247,312.32
  5. Step 5: Solve for x
    x = 47,640,247,312.32/252,002.40
  6. Step 6: Final answer
    x = 189,046.80

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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.