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Finding the Fourth Proportional to 123,561, 170,514.54 and 66,972.60

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Solution

The fourth proportional to 123,561, 170,514.54 and 66,972.60 is: 92,422.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,561 : 170,514.54 = 66,972.60 : x
  2. Step 2: Convert to fraction form
    123,561/170,514.54 = 66,972.60/x
  3. Step 3: Cross multiply
    123,561x = 170,514.54 × 66,972.60
  4. Step 4: Simplify right side
    123,561x = 11,419,802,081.60
  5. Step 5: Solve for x
    x = 11,419,802,081.60/123,561
  6. Step 6: Final answer
    x = 92,422.38

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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.