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Finding the Fourth Proportional to 119.34, 177.96 and 117.42

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Solution

The fourth proportional to 119.34, 177.96 and 117.42 is: 175.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.34 : 177.96 = 117.42 : x
  2. Step 2: Convert to fraction form
    119.34/177.96 = 117.42/x
  3. Step 3: Cross multiply
    119.34x = 177.96 × 117.42
  4. Step 4: Simplify right side
    119.34x = 20,896.06
  5. Step 5: Solve for x
    x = 20,896.06/119.34
  6. Step 6: Final answer
    x = 175.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.