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Finding the Fourth Proportional to 123,294.80, 169,991.91 and 100,610.75

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Solution

The fourth proportional to 123,294.80, 169,991.91 and 100,610.75 is: 138,716.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,294.80 : 169,991.91 = 100,610.75 : x
  2. Step 2: Convert to fraction form
    123,294.80/169,991.91 = 100,610.75/x
  3. Step 3: Cross multiply
    123,294.80x = 169,991.91 × 100,610.75
  4. Step 4: Simplify right side
    123,294.80x = 17,103,012,709.07
  5. Step 5: Solve for x
    x = 17,103,012,709.07/123,294.80
  6. Step 6: Final answer
    x = 138,716.42

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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.