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Finding the Fourth Proportional to 130.87, 195.35 and 121.35

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Solution

The fourth proportional to 130.87, 195.35 and 121.35 is: 181.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.87 : 195.35 = 121.35 : x
  2. Step 2: Convert to fraction form
    130.87/195.35 = 121.35/x
  3. Step 3: Cross multiply
    130.87x = 195.35 × 121.35
  4. Step 4: Simplify right side
    130.87x = 23,704.75
  5. Step 5: Solve for x
    x = 23,704.75/130.87
  6. Step 6: Final answer
    x = 181.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.