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Finding the Fourth Proportional to 127.07, 190.98 and 105.54

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Solution

The fourth proportional to 127.07, 190.98 and 105.54 is: 158.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.07 : 190.98 = 105.54 : x
  2. Step 2: Convert to fraction form
    127.07/190.98 = 105.54/x
  3. Step 3: Cross multiply
    127.07x = 190.98 × 105.54
  4. Step 4: Simplify right side
    127.07x = 20,156.03
  5. Step 5: Solve for x
    x = 20,156.03/127.07
  6. Step 6: Final answer
    x = 158.62

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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.