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Finding the Fourth Proportional to 177.12, 244.40 and 103.36

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Solution

The fourth proportional to 177.12, 244.40 and 103.36 is: 142.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.12 : 244.40 = 103.36 : x
  2. Step 2: Convert to fraction form
    177.12/244.40 = 103.36/x
  3. Step 3: Cross multiply
    177.12x = 244.40 × 103.36
  4. Step 4: Simplify right side
    177.12x = 25,261.18
  5. Step 5: Solve for x
    x = 25,261.18/177.12
  6. Step 6: Final answer
    x = 142.62

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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.