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Finding the Fourth Proportional to 85.11, 127.62 and 36.99

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Solution

The fourth proportional to 85.11, 127.62 and 36.99 is: 55.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85.11 : 127.62 = 36.99 : x
  2. Step 2: Convert to fraction form
    85.11/127.62 = 36.99/x
  3. Step 3: Cross multiply
    85.11x = 127.62 × 36.99
  4. Step 4: Simplify right side
    85.11x = 4,720.66
  5. Step 5: Solve for x
    x = 4,720.66/85.11
  6. Step 6: Final answer
    x = 55.47

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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.