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Finding the Fourth Proportional to 70.93, 98.50 and 69

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Solution

The fourth proportional to 70.93, 98.50 and 69 is: 95.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.93 : 98.50 = 69 : x
  2. Step 2: Convert to fraction form
    70.93/98.50 = 69/x
  3. Step 3: Cross multiply
    70.93x = 98.50 × 69
  4. Step 4: Simplify right side
    70.93x = 6,796.50
  5. Step 5: Solve for x
    x = 6,796.50/70.93
  6. Step 6: Final answer
    x = 95.82

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.