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Finding the Fourth Proportional to 126.64, 189.98 and 58.23

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Solution

The fourth proportional to 126.64, 189.98 and 58.23 is: 87.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.64 : 189.98 = 58.23 : x
  2. Step 2: Convert to fraction form
    126.64/189.98 = 58.23/x
  3. Step 3: Cross multiply
    126.64x = 189.98 × 58.23
  4. Step 4: Simplify right side
    126.64x = 11,062.98
  5. Step 5: Solve for x
    x = 11,062.98/126.64
  6. Step 6: Final answer
    x = 87.36

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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.