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Finding the Fourth Proportional to 130.93, 195.45 and 121.43

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Solution

The fourth proportional to 130.93, 195.45 and 121.43 is: 181.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.93 : 195.45 = 121.43 : x
  2. Step 2: Convert to fraction form
    130.93/195.45 = 121.43/x
  3. Step 3: Cross multiply
    130.93x = 195.45 × 121.43
  4. Step 4: Simplify right side
    130.93x = 23,732.89
  5. Step 5: Solve for x
    x = 23,732.89/130.93
  6. Step 6: Final answer
    x = 181.27

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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.