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Finding the Fourth Proportional to 148.94, 205.40 and 107.76

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Solution

The fourth proportional to 148.94, 205.40 and 107.76 is: 148.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.94 : 205.40 = 107.76 : x
  2. Step 2: Convert to fraction form
    148.94/205.40 = 107.76/x
  3. Step 3: Cross multiply
    148.94x = 205.40 × 107.76
  4. Step 4: Simplify right side
    148.94x = 22,134.94
  5. Step 5: Solve for x
    x = 22,134.94/148.94
  6. Step 6: Final answer
    x = 148.62

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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.