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Finding the Fourth Proportional to 130.03, 194.61 and 99.42

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Solution

The fourth proportional to 130.03, 194.61 and 99.42 is: 148.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.03 : 194.61 = 99.42 : x
  2. Step 2: Convert to fraction form
    130.03/194.61 = 99.42/x
  3. Step 3: Cross multiply
    130.03x = 194.61 × 99.42
  4. Step 4: Simplify right side
    130.03x = 19,348.13
  5. Step 5: Solve for x
    x = 19,348.13/130.03
  6. Step 6: Final answer
    x = 148.80

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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.