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Finding the Fourth Proportional to 99.60, 138.05 and 95.19

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Solution

The fourth proportional to 99.60, 138.05 and 95.19 is: 131.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.60 : 138.05 = 95.19 : x
  2. Step 2: Convert to fraction form
    99.60/138.05 = 95.19/x
  3. Step 3: Cross multiply
    99.60x = 138.05 × 95.19
  4. Step 4: Simplify right side
    99.60x = 13,140.98
  5. Step 5: Solve for x
    x = 13,140.98/99.60
  6. Step 6: Final answer
    x = 131.94

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.