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Finding the Fourth Proportional to 103.80, 154.83 and 102.25

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Solution

The fourth proportional to 103.80, 154.83 and 102.25 is: 152.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.80 : 154.83 = 102.25 : x
  2. Step 2: Convert to fraction form
    103.80/154.83 = 102.25/x
  3. Step 3: Cross multiply
    103.80x = 154.83 × 102.25
  4. Step 4: Simplify right side
    103.80x = 15,831.37
  5. Step 5: Solve for x
    x = 15,831.37/103.80
  6. Step 6: Final answer
    x = 152.52

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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.