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Finding the Fourth Proportional to 134.66, 185.88 and 89.81

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Solution

The fourth proportional to 134.66, 185.88 and 89.81 is: 123.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.66 : 185.88 = 89.81 : x
  2. Step 2: Convert to fraction form
    134.66/185.88 = 89.81/x
  3. Step 3: Cross multiply
    134.66x = 185.88 × 89.81
  4. Step 4: Simplify right side
    134.66x = 16,693.99
  5. Step 5: Solve for x
    x = 16,693.99/134.66
  6. Step 6: Final answer
    x = 123.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.