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Finding the Fourth Proportional to 135,481.28, 186,961.70 and 75,051.73

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Solution

The fourth proportional to 135,481.28, 186,961.70 and 75,051.73 is: 103,570.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,481.28 : 186,961.70 = 75,051.73 : x
  2. Step 2: Convert to fraction form
    135,481.28/186,961.70 = 75,051.73/x
  3. Step 3: Cross multiply
    135,481.28x = 186,961.70 × 75,051.73
  4. Step 4: Simplify right side
    135,481.28x = 14,031,797,718.67
  5. Step 5: Solve for x
    x = 14,031,797,718.67/135,481.28
  6. Step 6: Final answer
    x = 103,570.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.