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Finding the Fourth Proportional to 86.23, 119.15 and 63

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Solution

The fourth proportional to 86.23, 119.15 and 63 is: 87.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.23 : 119.15 = 63 : x
  2. Step 2: Convert to fraction form
    86.23/119.15 = 63/x
  3. Step 3: Cross multiply
    86.23x = 119.15 × 63
  4. Step 4: Simplify right side
    86.23x = 7,506.45
  5. Step 5: Solve for x
    x = 7,506.45/86.23
  6. Step 6: Final answer
    x = 87.05

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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.