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Finding the Fourth Proportional to 159.98, 220.75 and 92.69

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Solution

The fourth proportional to 159.98, 220.75 and 92.69 is: 127.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.98 : 220.75 = 92.69 : x
  2. Step 2: Convert to fraction form
    159.98/220.75 = 92.69/x
  3. Step 3: Cross multiply
    159.98x = 220.75 × 92.69
  4. Step 4: Simplify right side
    159.98x = 20,459.98
  5. Step 5: Solve for x
    x = 20,459.98/159.98
  6. Step 6: Final answer
    x = 127.89

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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.