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Finding the Fourth Proportional to 126.50, 189.88 and 94.64

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Solution

The fourth proportional to 126.50, 189.88 and 94.64 is: 142.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.50 : 189.88 = 94.64 : x
  2. Step 2: Convert to fraction form
    126.50/189.88 = 94.64/x
  3. Step 3: Cross multiply
    126.50x = 189.88 × 94.64
  4. Step 4: Simplify right side
    126.50x = 17,969.06
  5. Step 5: Solve for x
    x = 17,969.06/126.50
  6. Step 6: Final answer
    x = 142.05

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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.