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Finding the Fourth Proportional to 135,870.88, 203,713.28 and 69,181.92

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Solution

The fourth proportional to 135,870.88, 203,713.28 and 69,181.92 is: 103,725.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,870.88 : 203,713.28 = 69,181.92 : x
  2. Step 2: Convert to fraction form
    135,870.88/203,713.28 = 69,181.92/x
  3. Step 3: Cross multiply
    135,870.88x = 203,713.28 × 69,181.92
  4. Step 4: Simplify right side
    135,870.88x = 14,093,275,839.90
  5. Step 5: Solve for x
    x = 14,093,275,839.90/135,870.88
  6. Step 6: Final answer
    x = 103,725.51

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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.