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Finding the Fourth Proportional to 123,157.17, 169,956.79 and 66,568.55

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Solution

The fourth proportional to 123,157.17, 169,956.79 and 66,568.55 is: 91,864.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,157.17 : 169,956.79 = 66,568.55 : x
  2. Step 2: Convert to fraction form
    123,157.17/169,956.79 = 66,568.55/x
  3. Step 3: Cross multiply
    123,157.17x = 169,956.79 × 66,568.55
  4. Step 4: Simplify right side
    123,157.17x = 11,313,776,056.75
  5. Step 5: Solve for x
    x = 11,313,776,056.75/123,157.17
  6. Step 6: Final answer
    x = 91,864.53

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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.