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Finding the Fourth Proportional to 123,021.51, 169,769.70 and 69,306.51

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Solution

The fourth proportional to 123,021.51, 169,769.70 and 69,306.51 is: 95,642.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,021.51 : 169,769.70 = 69,306.51 : x
  2. Step 2: Convert to fraction form
    123,021.51/169,769.70 = 69,306.51/x
  3. Step 3: Cross multiply
    123,021.51x = 169,769.70 × 69,306.51
  4. Step 4: Simplify right side
    123,021.51x = 11,766,145,410.75
  5. Step 5: Solve for x
    x = 11,766,145,410.75/123,021.51
  6. Step 6: Final answer
    x = 95,642.99

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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.