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Finding the Fourth Proportional to 127.18, 190.61 and 58.56

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Solution

The fourth proportional to 127.18, 190.61 and 58.56 is: 87.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.18 : 190.61 = 58.56 : x
  2. Step 2: Convert to fraction form
    127.18/190.61 = 58.56/x
  3. Step 3: Cross multiply
    127.18x = 190.61 × 58.56
  4. Step 4: Simplify right side
    127.18x = 11,161.33
  5. Step 5: Solve for x
    x = 11,161.33/127.18
  6. Step 6: Final answer
    x = 87.76

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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.