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Finding the Fourth Proportional to 127.07, 189.56 and 123.15

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Solution

The fourth proportional to 127.07, 189.56 and 123.15 is: 183.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.07 : 189.56 = 123.15 : x
  2. Step 2: Convert to fraction form
    127.07/189.56 = 123.15/x
  3. Step 3: Cross multiply
    127.07x = 189.56 × 123.15
  4. Step 4: Simplify right side
    127.07x = 23,343.70
  5. Step 5: Solve for x
    x = 23,343.70/127.07
  6. Step 6: Final answer
    x = 183.71

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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.