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Finding the Fourth Proportional to 71.51, 98.52 and 69

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Solution

The fourth proportional to 71.51, 98.52 and 69 is: 95.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.51 : 98.52 = 69 : x
  2. Step 2: Convert to fraction form
    71.51/98.52 = 69/x
  3. Step 3: Cross multiply
    71.51x = 98.52 × 69
  4. Step 4: Simplify right side
    71.51x = 6,797.88
  5. Step 5: Solve for x
    x = 6,797.88/71.51
  6. Step 6: Final answer
    x = 95.07

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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.