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Finding the Fourth Proportional to 127.55, 191.14 and 94.79

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Solution

The fourth proportional to 127.55, 191.14 and 94.79 is: 142.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.55 : 191.14 = 94.79 : x
  2. Step 2: Convert to fraction form
    127.55/191.14 = 94.79/x
  3. Step 3: Cross multiply
    127.55x = 191.14 × 94.79
  4. Step 4: Simplify right side
    127.55x = 18,118.40
  5. Step 5: Solve for x
    x = 18,118.40/127.55
  6. Step 6: Final answer
    x = 142.05

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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.