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Finding the Fourth Proportional to 138,172.20, 207,249.30 and 36,968.88

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Solution

The fourth proportional to 138,172.20, 207,249.30 and 36,968.88 is: 55,450.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,172.20 : 207,249.30 = 36,968.88 : x
  2. Step 2: Convert to fraction form
    138,172.20/207,249.30 = 36,968.88/x
  3. Step 3: Cross multiply
    138,172.20x = 207,249.30 × 36,968.88
  4. Step 4: Simplify right side
    138,172.20x = 7,661,774,501.78
  5. Step 5: Solve for x
    x = 7,661,774,501.78/138,172.20
  6. Step 6: Final answer
    x = 55,450.91

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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.