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Finding the Fourth Proportional to 123,287.50, 170,137.98 and 66,700.09

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Solution

The fourth proportional to 123,287.50, 170,137.98 and 66,700.09 is: 92,046.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,287.50 : 170,137.98 = 66,700.09 : x
  2. Step 2: Convert to fraction form
    123,287.50/170,137.98 = 66,700.09/x
  3. Step 3: Cross multiply
    123,287.50x = 170,137.98 × 66,700.09
  4. Step 4: Simplify right side
    123,287.50x = 11,348,218,578.42
  5. Step 5: Solve for x
    x = 11,348,218,578.42/123,287.50
  6. Step 6: Final answer
    x = 92,046.79

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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.