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Finding the Fourth Proportional to 71.04, 106.08 and 69.69

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Solution

The fourth proportional to 71.04, 106.08 and 69.69 is: 104.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.04 : 106.08 = 69.69 : x
  2. Step 2: Convert to fraction form
    71.04/106.08 = 69.69/x
  3. Step 3: Cross multiply
    71.04x = 106.08 × 69.69
  4. Step 4: Simplify right side
    71.04x = 7,392.72
  5. Step 5: Solve for x
    x = 7,392.72/71.04
  6. Step 6: Final answer
    x = 104.06

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.