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Finding the Fourth Proportional to 123,342.82, 170,213.50 and 66,754.20

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Solution

The fourth proportional to 123,342.82, 170,213.50 and 66,754.20 is: 92,121.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,342.82 : 170,213.50 = 66,754.20 : x
  2. Step 2: Convert to fraction form
    123,342.82/170,213.50 = 66,754.20/x
  3. Step 3: Cross multiply
    123,342.82x = 170,213.50 × 66,754.20
  4. Step 4: Simplify right side
    123,342.82x = 11,362,466,021.70
  5. Step 5: Solve for x
    x = 11,362,466,021.70/123,342.82
  6. Step 6: Final answer
    x = 92,121.02

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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.