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Finding the Fourth Proportional to 123,616.79, 170,570.96 and 81,227.87

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Solution

The fourth proportional to 123,616.79, 170,570.96 and 81,227.87 is: 112,081.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,616.79 : 170,570.96 = 81,227.87 : x
  2. Step 2: Convert to fraction form
    123,616.79/170,570.96 = 81,227.87/x
  3. Step 3: Cross multiply
    123,616.79x = 170,570.96 × 81,227.87
  4. Step 4: Simplify right side
    123,616.79x = 13,855,116,257.07
  5. Step 5: Solve for x
    x = 13,855,116,257.07/123,616.79
  6. Step 6: Final answer
    x = 112,081.18

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.