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Finding the Fourth Proportional to 138,900.44, 208,627.43 and 131,066.88

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Solution

The fourth proportional to 138,900.44, 208,627.43 and 131,066.88 is: 196,861.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,900.44 : 208,627.43 = 131,066.88 : x
  2. Step 2: Convert to fraction form
    138,900.44/208,627.43 = 131,066.88/x
  3. Step 3: Cross multiply
    138,900.44x = 208,627.43 × 131,066.88
  4. Step 4: Simplify right side
    138,900.44x = 27,344,145,677.18
  5. Step 5: Solve for x
    x = 27,344,145,677.18/138,900.44
  6. Step 6: Final answer
    x = 196,861.48

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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.