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Finding the Fourth Proportional to 127.56, 190.11 and 126.50

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Solution

The fourth proportional to 127.56, 190.11 and 126.50 is: 188.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.56 : 190.11 = 126.50 : x
  2. Step 2: Convert to fraction form
    127.56/190.11 = 126.50/x
  3. Step 3: Cross multiply
    127.56x = 190.11 × 126.50
  4. Step 4: Simplify right side
    127.56x = 24,047.96
  5. Step 5: Solve for x
    x = 24,047.96/127.56
  6. Step 6: Final answer
    x = 188.52

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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.