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Finding the Fourth Proportional to 123,536.34, 170,480.30 and 66,947.72

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Solution

The fourth proportional to 123,536.34, 170,480.30 and 66,947.72 is: 92,387.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,536.34 : 170,480.30 = 66,947.72 : x
  2. Step 2: Convert to fraction form
    123,536.34/170,480.30 = 66,947.72/x
  3. Step 3: Cross multiply
    123,536.34x = 170,480.30 × 66,947.72
  4. Step 4: Simplify right side
    123,536.34x = 11,413,266,202.78
  5. Step 5: Solve for x
    x = 11,413,266,202.78/123,536.34
  6. Step 6: Final answer
    x = 92,387.93

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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.