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Finding the Fourth Proportional to 123,242.75, 170,074.99 and 66,654.12

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Solution

The fourth proportional to 123,242.75, 170,074.99 and 66,654.12 is: 91,982.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,242.75 : 170,074.99 = 66,654.12 : x
  2. Step 2: Convert to fraction form
    123,242.75/170,074.99 = 66,654.12/x
  3. Step 3: Cross multiply
    123,242.75x = 170,074.99 × 66,654.12
  4. Step 4: Simplify right side
    123,242.75x = 11,336,198,625.82
  5. Step 5: Solve for x
    x = 11,336,198,625.82/123,242.75
  6. Step 6: Final answer
    x = 91,982.69

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1.5x scale

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.