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Finding the Fourth Proportional to 123,479.67, 170,402.23 and 66,891.05

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Solution

The fourth proportional to 123,479.67, 170,402.23 and 66,891.05 is: 92,309.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,479.67 : 170,402.23 = 66,891.05 : x
  2. Step 2: Convert to fraction form
    123,479.67/170,402.23 = 66,891.05/x
  3. Step 3: Cross multiply
    123,479.67x = 170,402.23 × 66,891.05
  4. Step 4: Simplify right side
    123,479.67x = 11,398,383,957.65
  5. Step 5: Solve for x
    x = 11,398,383,957.65/123,479.67
  6. Step 6: Final answer
    x = 92,309.80

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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.