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Finding the Fourth Proportional to 138, 207.36 and 127.44

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Solution

The fourth proportional to 138, 207.36 and 127.44 is: 191.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138 : 207.36 = 127.44 : x
  2. Step 2: Convert to fraction form
    138/207.36 = 127.44/x
  3. Step 3: Cross multiply
    138x = 207.36 × 127.44
  4. Step 4: Simplify right side
    138x = 26,425.96
  5. Step 5: Solve for x
    x = 26,425.96/138
  6. Step 6: Final answer
    x = 191.49

Related Problems

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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.