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Finding the Fourth Proportional to 201.45, 277.95 and 117.39

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Solution

The fourth proportional to 201.45, 277.95 and 117.39 is: 161.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.45 : 277.95 = 117.39 : x
  2. Step 2: Convert to fraction form
    201.45/277.95 = 117.39/x
  3. Step 3: Cross multiply
    201.45x = 277.95 × 117.39
  4. Step 4: Simplify right side
    201.45x = 32,628.55
  5. Step 5: Solve for x
    x = 32,628.55/201.45
  6. Step 6: Final answer
    x = 161.97

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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.