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Finding the Fourth Proportional to 127.52, 176.10 and 107.66

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Solution

The fourth proportional to 127.52, 176.10 and 107.66 is: 148.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.52 : 176.10 = 107.66 : x
  2. Step 2: Convert to fraction form
    127.52/176.10 = 107.66/x
  3. Step 3: Cross multiply
    127.52x = 176.10 × 107.66
  4. Step 4: Simplify right side
    127.52x = 18,958.93
  5. Step 5: Solve for x
    x = 18,958.93/127.52
  6. Step 6: Final answer
    x = 148.67

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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.