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Finding the Fourth Proportional to 130.95, 196.43 and 53.87

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Solution

The fourth proportional to 130.95, 196.43 and 53.87 is: 80.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.95 : 196.43 = 53.87 : x
  2. Step 2: Convert to fraction form
    130.95/196.43 = 53.87/x
  3. Step 3: Cross multiply
    130.95x = 196.43 × 53.87
  4. Step 4: Simplify right side
    130.95x = 10,580.43
  5. Step 5: Solve for x
    x = 10,580.43/130.95
  6. Step 6: Final answer
    x = 80.80

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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.