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Finding the Fourth Proportional to 68.60, 94.06 and 66.98

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Solution

The fourth proportional to 68.60, 94.06 and 66.98 is: 91.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.60 : 94.06 = 66.98 : x
  2. Step 2: Convert to fraction form
    68.60/94.06 = 66.98/x
  3. Step 3: Cross multiply
    68.60x = 94.06 × 66.98
  4. Step 4: Simplify right side
    68.60x = 6,300.14
  5. Step 5: Solve for x
    x = 6,300.14/68.60
  6. Step 6: Final answer
    x = 91.84

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.