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Finding the Fourth Proportional to 165.65, 248.30 and 92.45

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Solution

The fourth proportional to 165.65, 248.30 and 92.45 is: 138.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.65 : 248.30 = 92.45 : x
  2. Step 2: Convert to fraction form
    165.65/248.30 = 92.45/x
  3. Step 3: Cross multiply
    165.65x = 248.30 × 92.45
  4. Step 4: Simplify right side
    165.65x = 22,955.34
  5. Step 5: Solve for x
    x = 22,955.34/165.65
  6. Step 6: Final answer
    x = 138.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.