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Finding the Fourth Proportional to 126.16, 189.06 and 117.97

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Solution

The fourth proportional to 126.16, 189.06 and 117.97 is: 176.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.16 : 189.06 = 117.97 : x
  2. Step 2: Convert to fraction form
    126.16/189.06 = 117.97/x
  3. Step 3: Cross multiply
    126.16x = 189.06 × 117.97
  4. Step 4: Simplify right side
    126.16x = 22,303.41
  5. Step 5: Solve for x
    x = 22,303.41/126.16
  6. Step 6: Final answer
    x = 176.79

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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.