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Finding the Fourth Proportional to 134.96, 202.35 and 66.39

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Solution

The fourth proportional to 134.96, 202.35 and 66.39 is: 99.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.96 : 202.35 = 66.39 : x
  2. Step 2: Convert to fraction form
    134.96/202.35 = 66.39/x
  3. Step 3: Cross multiply
    134.96x = 202.35 × 66.39
  4. Step 4: Simplify right side
    134.96x = 13,434.02
  5. Step 5: Solve for x
    x = 13,434.02/134.96
  6. Step 6: Final answer
    x = 99.54

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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.