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Finding the Fourth Proportional to 201.07, 277.45 and 123.45

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Solution

The fourth proportional to 201.07, 277.45 and 123.45 is: 170.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.07 : 277.45 = 123.45 : x
  2. Step 2: Convert to fraction form
    201.07/277.45 = 123.45/x
  3. Step 3: Cross multiply
    201.07x = 277.45 × 123.45
  4. Step 4: Simplify right side
    201.07x = 34,251.20
  5. Step 5: Solve for x
    x = 34,251.20/201.07
  6. Step 6: Final answer
    x = 170.34

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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.