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Finding the Fourth Proportional to 130.44, 196.39 and 90.13

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Solution

The fourth proportional to 130.44, 196.39 and 90.13 is: 135.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.44 : 196.39 = 90.13 : x
  2. Step 2: Convert to fraction form
    130.44/196.39 = 90.13/x
  3. Step 3: Cross multiply
    130.44x = 196.39 × 90.13
  4. Step 4: Simplify right side
    130.44x = 17,699.91
  5. Step 5: Solve for x
    x = 17,699.91/130.44
  6. Step 6: Final answer
    x = 135.69

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.