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Finding the Fourth Proportional to 127.56, 191.46 and 76.26

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Solution

The fourth proportional to 127.56, 191.46 and 76.26 is: 114.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.56 : 191.46 = 76.26 : x
  2. Step 2: Convert to fraction form
    127.56/191.46 = 76.26/x
  3. Step 3: Cross multiply
    127.56x = 191.46 × 76.26
  4. Step 4: Simplify right side
    127.56x = 14,600.74
  5. Step 5: Solve for x
    x = 14,600.74/127.56
  6. Step 6: Final answer
    x = 114.46

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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.