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Finding the Fourth Proportional to 123,474.32, 170,394 and 66,885.84

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Solution

The fourth proportional to 123,474.32, 170,394 and 66,885.84 is: 92,302.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,474.32 : 170,394 = 66,885.84 : x
  2. Step 2: Convert to fraction form
    123,474.32/170,394 = 66,885.84/x
  3. Step 3: Cross multiply
    123,474.32x = 170,394 × 66,885.84
  4. Step 4: Simplify right side
    123,474.32x = 11,396,945,820.96
  5. Step 5: Solve for x
    x = 11,396,945,820.96/123,474.32
  6. Step 6: Final answer
    x = 92,302.15

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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.