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Finding the Fourth Proportional to 127.34, 189.56 and 126.66

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Solution

The fourth proportional to 127.34, 189.56 and 126.66 is: 188.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.34 : 189.56 = 126.66 : x
  2. Step 2: Convert to fraction form
    127.34/189.56 = 126.66/x
  3. Step 3: Cross multiply
    127.34x = 189.56 × 126.66
  4. Step 4: Simplify right side
    127.34x = 24,009.67
  5. Step 5: Solve for x
    x = 24,009.67/127.34
  6. Step 6: Final answer
    x = 188.55

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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.