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Finding the Fourth Proportional to 70.10, 104.87 and 65.85

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Solution

The fourth proportional to 70.10, 104.87 and 65.85 is: 98.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.10 : 104.87 = 65.85 : x
  2. Step 2: Convert to fraction form
    70.10/104.87 = 65.85/x
  3. Step 3: Cross multiply
    70.10x = 104.87 × 65.85
  4. Step 4: Simplify right side
    70.10x = 6,905.69
  5. Step 5: Solve for x
    x = 6,905.69/70.10
  6. Step 6: Final answer
    x = 98.51

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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.