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Finding the Fourth Proportional to 86.85, 119.85 and 48.04

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Solution

The fourth proportional to 86.85, 119.85 and 48.04 is: 66.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.85 : 119.85 = 48.04 : x
  2. Step 2: Convert to fraction form
    86.85/119.85 = 48.04/x
  3. Step 3: Cross multiply
    86.85x = 119.85 × 48.04
  4. Step 4: Simplify right side
    86.85x = 5,756.99
  5. Step 5: Solve for x
    x = 5,756.99/86.85
  6. Step 6: Final answer
    x = 66.29

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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.