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Finding the Fourth Proportional to 127.19, 176.33 and 124.67

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Solution

The fourth proportional to 127.19, 176.33 and 124.67 is: 172.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.19 : 176.33 = 124.67 : x
  2. Step 2: Convert to fraction form
    127.19/176.33 = 124.67/x
  3. Step 3: Cross multiply
    127.19x = 176.33 × 124.67
  4. Step 4: Simplify right side
    127.19x = 21,983.81
  5. Step 5: Solve for x
    x = 21,983.81/127.19
  6. Step 6: Final answer
    x = 172.84

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.