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Finding the Fourth Proportional to 148.87, 205.38 and 96.40

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Solution

The fourth proportional to 148.87, 205.38 and 96.40 is: 132.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.87 : 205.38 = 96.40 : x
  2. Step 2: Convert to fraction form
    148.87/205.38 = 96.40/x
  3. Step 3: Cross multiply
    148.87x = 205.38 × 96.40
  4. Step 4: Simplify right side
    148.87x = 19,798.63
  5. Step 5: Solve for x
    x = 19,798.63/148.87
  6. Step 6: Final answer
    x = 132.99

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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.