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Finding the Fourth Proportional to 139.30, 192.03 and 109.73

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Solution

The fourth proportional to 139.30, 192.03 and 109.73 is: 151.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.30 : 192.03 = 109.73 : x
  2. Step 2: Convert to fraction form
    139.30/192.03 = 109.73/x
  3. Step 3: Cross multiply
    139.30x = 192.03 × 109.73
  4. Step 4: Simplify right side
    139.30x = 21,071.45
  5. Step 5: Solve for x
    x = 21,071.45/139.30
  6. Step 6: Final answer
    x = 151.27

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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.