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Finding the Fourth Proportional to 100.86, 138.60 and 96.34

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Solution

The fourth proportional to 100.86, 138.60 and 96.34 is: 132.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.86 : 138.60 = 96.34 : x
  2. Step 2: Convert to fraction form
    100.86/138.60 = 96.34/x
  3. Step 3: Cross multiply
    100.86x = 138.60 × 96.34
  4. Step 4: Simplify right side
    100.86x = 13,352.72
  5. Step 5: Solve for x
    x = 13,352.72/100.86
  6. Step 6: Final answer
    x = 132.39

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.