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Finding the Fourth Proportional to 123,720.62, 170,694.78 and 69,264.79

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Solution

The fourth proportional to 123,720.62, 170,694.78 and 69,264.79 is: 95,563.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,720.62 : 170,694.78 = 69,264.79 : x
  2. Step 2: Convert to fraction form
    123,720.62/170,694.78 = 69,264.79/x
  3. Step 3: Cross multiply
    123,720.62x = 170,694.78 × 69,264.79
  4. Step 4: Simplify right side
    123,720.62x = 11,823,137,190.36
  5. Step 5: Solve for x
    x = 11,823,137,190.36/123,720.62
  6. Step 6: Final answer
    x = 95,563.19

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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.