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Finding the Fourth Proportional to 123,306.78, 170,163.78 and 66,718.14

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Solution

The fourth proportional to 123,306.78, 170,163.78 and 66,718.14 is: 92,071.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,306.78 : 170,163.78 = 66,718.14 : x
  2. Step 2: Convert to fraction form
    123,306.78/170,163.78 = 66,718.14/x
  3. Step 3: Cross multiply
    123,306.78x = 170,163.78 × 66,718.14
  4. Step 4: Simplify right side
    123,306.78x = 11,353,010,896.97
  5. Step 5: Solve for x
    x = 11,353,010,896.97/123,306.78
  6. Step 6: Final answer
    x = 92,071.26

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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.