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Finding the Fourth Proportional to 165.34, 248.10 and 74.02

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Solution

The fourth proportional to 165.34, 248.10 and 74.02 is: 111.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.34 : 248.10 = 74.02 : x
  2. Step 2: Convert to fraction form
    165.34/248.10 = 74.02/x
  3. Step 3: Cross multiply
    165.34x = 248.10 × 74.02
  4. Step 4: Simplify right side
    165.34x = 18,364.36
  5. Step 5: Solve for x
    x = 18,364.36/165.34
  6. Step 6: Final answer
    x = 111.07

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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.