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Finding the Fourth Proportional to 68.70, 92.70 and 68.70

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Solution

The fourth proportional to 68.70, 92.70 and 68.70 is: 92.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.70 : 92.70 = 68.70 : x
  2. Step 2: Convert to fraction form
    68.70/92.70 = 68.70/x
  3. Step 3: Cross multiply
    68.70x = 92.70 × 68.70
  4. Step 4: Simplify right side
    68.70x = 6,368.49
  5. Step 5: Solve for x
    x = 6,368.49/68.70
  6. Step 6: Final answer
    x = 92.70

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.