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Finding the Fourth Proportional to 130.80, 195.09 and 117.84

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Solution

The fourth proportional to 130.80, 195.09 and 117.84 is: 175.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.80 : 195.09 = 117.84 : x
  2. Step 2: Convert to fraction form
    130.80/195.09 = 117.84/x
  3. Step 3: Cross multiply
    130.80x = 195.09 × 117.84
  4. Step 4: Simplify right side
    130.80x = 22,989.41
  5. Step 5: Solve for x
    x = 22,989.41/130.80
  6. Step 6: Final answer
    x = 175.76

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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.