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Finding the Fourth Proportional to 103.28, 154.76 and 42.37

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Solution

The fourth proportional to 103.28, 154.76 and 42.37 is: 63.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.28 : 154.76 = 42.37 : x
  2. Step 2: Convert to fraction form
    103.28/154.76 = 42.37/x
  3. Step 3: Cross multiply
    103.28x = 154.76 × 42.37
  4. Step 4: Simplify right side
    103.28x = 6,557.69
  5. Step 5: Solve for x
    x = 6,557.69/103.28
  6. Step 6: Final answer
    x = 63.50

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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.