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Finding the Fourth Proportional to 86.70, 119.59 and 63.03

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Solution

The fourth proportional to 86.70, 119.59 and 63.03 is: 86.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.70 : 119.59 = 63.03 : x
  2. Step 2: Convert to fraction form
    86.70/119.59 = 63.03/x
  3. Step 3: Cross multiply
    86.70x = 119.59 × 63.03
  4. Step 4: Simplify right side
    86.70x = 7,537.76
  5. Step 5: Solve for x
    x = 7,537.76/86.70
  6. Step 6: Final answer
    x = 86.94

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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.