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Finding the Fourth Proportional to 138.30, 191.04 and 96.99

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Solution

The fourth proportional to 138.30, 191.04 and 96.99 is: 133.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.30 : 191.04 = 96.99 : x
  2. Step 2: Convert to fraction form
    138.30/191.04 = 96.99/x
  3. Step 3: Cross multiply
    138.30x = 191.04 × 96.99
  4. Step 4: Simplify right side
    138.30x = 18,529.45
  5. Step 5: Solve for x
    x = 18,529.45/138.30
  6. Step 6: Final answer
    x = 133.98

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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.