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Finding the Fourth Proportional to 134.95, 202.43 and 61.81

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Solution

The fourth proportional to 134.95, 202.43 and 61.81 is: 92.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.95 : 202.43 = 61.81 : x
  2. Step 2: Convert to fraction form
    134.95/202.43 = 61.81/x
  3. Step 3: Cross multiply
    134.95x = 202.43 × 61.81
  4. Step 4: Simplify right side
    134.95x = 12,512.20
  5. Step 5: Solve for x
    x = 12,512.20/134.95
  6. Step 6: Final answer
    x = 92.72

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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.