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Finding the Fourth Proportional to 130.28, 195.48 and 69.40

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Solution

The fourth proportional to 130.28, 195.48 and 69.40 is: 104.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.28 : 195.48 = 69.40 : x
  2. Step 2: Convert to fraction form
    130.28/195.48 = 69.40/x
  3. Step 3: Cross multiply
    130.28x = 195.48 × 69.40
  4. Step 4: Simplify right side
    130.28x = 13,566.01
  5. Step 5: Solve for x
    x = 13,566.01/130.28
  6. Step 6: Final answer
    x = 104.13

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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.