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Finding the Fourth Proportional to 157.62, 217.54 and 123.06

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Solution

The fourth proportional to 157.62, 217.54 and 123.06 is: 169.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.62 : 217.54 = 123.06 : x
  2. Step 2: Convert to fraction form
    157.62/217.54 = 123.06/x
  3. Step 3: Cross multiply
    157.62x = 217.54 × 123.06
  4. Step 4: Simplify right side
    157.62x = 26,769.08
  5. Step 5: Solve for x
    x = 26,769.08/157.62
  6. Step 6: Final answer
    x = 169.84

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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.