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Finding the Fourth Proportional to 127.04, 174.83 and 121.57

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Solution

The fourth proportional to 127.04, 174.83 and 121.57 is: 167.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.04 : 174.83 = 121.57 : x
  2. Step 2: Convert to fraction form
    127.04/174.83 = 121.57/x
  3. Step 3: Cross multiply
    127.04x = 174.83 × 121.57
  4. Step 4: Simplify right side
    127.04x = 21,253.04
  5. Step 5: Solve for x
    x = 21,253.04/127.04
  6. Step 6: Final answer
    x = 167.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.