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Finding the Fourth Proportional to 130.20, 194.95 and 89.56

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Solution

The fourth proportional to 130.20, 194.95 and 89.56 is: 134.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.20 : 194.95 = 89.56 : x
  2. Step 2: Convert to fraction form
    130.20/194.95 = 89.56/x
  3. Step 3: Cross multiply
    130.20x = 194.95 × 89.56
  4. Step 4: Simplify right side
    130.20x = 17,459.72
  5. Step 5: Solve for x
    x = 17,459.72/130.20
  6. Step 6: Final answer
    x = 134.10

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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.