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Finding the Fourth Proportional to 127.94, 190.90 and 118.28

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Solution

The fourth proportional to 127.94, 190.90 and 118.28 is: 176.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.94 : 190.90 = 118.28 : x
  2. Step 2: Convert to fraction form
    127.94/190.90 = 118.28/x
  3. Step 3: Cross multiply
    127.94x = 190.90 × 118.28
  4. Step 4: Simplify right side
    127.94x = 22,579.65
  5. Step 5: Solve for x
    x = 22,579.65/127.94
  6. Step 6: Final answer
    x = 176.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.