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Finding the Fourth Proportional to 123,418.70, 170,318.43 and 66,830.30

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Solution

The fourth proportional to 123,418.70, 170,318.43 and 66,830.30 is: 92,226.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,418.70 : 170,318.43 = 66,830.30 : x
  2. Step 2: Convert to fraction form
    123,418.70/170,318.43 = 66,830.30/x
  3. Step 3: Cross multiply
    123,418.70x = 170,318.43 × 66,830.30
  4. Step 4: Simplify right side
    123,418.70x = 11,382,431,772.43
  5. Step 5: Solve for x
    x = 11,382,431,772.43/123,418.70
  6. Step 6: Final answer
    x = 92,226.15

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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.