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Finding the Fourth Proportional to 192.80, 266.10 and 127.28

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Solution

The fourth proportional to 192.80, 266.10 and 127.28 is: 175.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.80 : 266.10 = 127.28 : x
  2. Step 2: Convert to fraction form
    192.80/266.10 = 127.28/x
  3. Step 3: Cross multiply
    192.80x = 266.10 × 127.28
  4. Step 4: Simplify right side
    192.80x = 33,869.21
  5. Step 5: Solve for x
    x = 33,869.21/192.80
  6. Step 6: Final answer
    x = 175.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.