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Finding the Fourth Proportional to 134.76, 202.06 and 91.88

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Solution

The fourth proportional to 134.76, 202.06 and 91.88 is: 137.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.76 : 202.06 = 91.88 : x
  2. Step 2: Convert to fraction form
    134.76/202.06 = 91.88/x
  3. Step 3: Cross multiply
    134.76x = 202.06 × 91.88
  4. Step 4: Simplify right side
    134.76x = 18,565.27
  5. Step 5: Solve for x
    x = 18,565.27/134.76
  6. Step 6: Final answer
    x = 137.77

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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.