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Finding the Fourth Proportional to 86.00, 118.71 and 63.99

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Solution

The fourth proportional to 86.00, 118.71 and 63.99 is: 88.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.00 : 118.71 = 63.99 : x
  2. Step 2: Convert to fraction form
    86.00/118.71 = 63.99/x
  3. Step 3: Cross multiply
    86.00x = 118.71 × 63.99
  4. Step 4: Simplify right side
    86.00x = 7,596.25
  5. Step 5: Solve for x
    x = 7,596.25/86.00
  6. Step 6: Final answer
    x = 88.33

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