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Finding the Fourth Proportional to 130.99, 196.55 and 49.89

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Solution

The fourth proportional to 130.99, 196.55 and 49.89 is: 74.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.99 : 196.55 = 49.89 : x
  2. Step 2: Convert to fraction form
    130.99/196.55 = 49.89/x
  3. Step 3: Cross multiply
    130.99x = 196.55 × 49.89
  4. Step 4: Simplify right side
    130.99x = 9,806.14
  5. Step 5: Solve for x
    x = 9,806.14/130.99
  6. Step 6: Final answer
    x = 74.86

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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.