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Finding the Fourth Proportional to 130.99, 196.51 and 39.69

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Solution

The fourth proportional to 130.99, 196.51 and 39.69 is: 59.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.99 : 196.51 = 39.69 : x
  2. Step 2: Convert to fraction form
    130.99/196.51 = 39.69/x
  3. Step 3: Cross multiply
    130.99x = 196.51 × 39.69
  4. Step 4: Simplify right side
    130.99x = 7,799.28
  5. Step 5: Solve for x
    x = 7,799.28/130.99
  6. Step 6: Final answer
    x = 59.54

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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.