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Finding the Fourth Proportional to 127.18, 189.37 and 126.58

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Solution

The fourth proportional to 127.18, 189.37 and 126.58 is: 188.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.18 : 189.37 = 126.58 : x
  2. Step 2: Convert to fraction form
    127.18/189.37 = 126.58/x
  3. Step 3: Cross multiply
    127.18x = 189.37 × 126.58
  4. Step 4: Simplify right side
    127.18x = 23,970.45
  5. Step 5: Solve for x
    x = 23,970.45/127.18
  6. Step 6: Final answer
    x = 188.48

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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.