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Finding the Fourth Proportional to 127.67, 191.48 and 46.49

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Solution

The fourth proportional to 127.67, 191.48 and 46.49 is: 69.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.67 : 191.48 = 46.49 : x
  2. Step 2: Convert to fraction form
    127.67/191.48 = 46.49/x
  3. Step 3: Cross multiply
    127.67x = 191.48 × 46.49
  4. Step 4: Simplify right side
    127.67x = 8,900.72
  5. Step 5: Solve for x
    x = 8,900.72/127.67
  6. Step 6: Final answer
    x = 69.72

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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.