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Finding the Fourth Proportional to 138,690.22, 207,910.49 and 49,881.32

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Solution

The fourth proportional to 138,690.22, 207,910.49 and 49,881.32 is: 74,777.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,690.22 : 207,910.49 = 49,881.32 : x
  2. Step 2: Convert to fraction form
    138,690.22/207,910.49 = 49,881.32/x
  3. Step 3: Cross multiply
    138,690.22x = 207,910.49 × 49,881.32
  4. Step 4: Simplify right side
    138,690.22x = 10,370,848,394.09
  5. Step 5: Solve for x
    x = 10,370,848,394.09/138,690.22
  6. Step 6: Final answer
    x = 74,777.07

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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.