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Finding the Fourth Proportional to 68.35, 94.43 and 65.02

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Solution

The fourth proportional to 68.35, 94.43 and 65.02 is: 89.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.35 : 94.43 = 65.02 : x
  2. Step 2: Convert to fraction form
    68.35/94.43 = 65.02/x
  3. Step 3: Cross multiply
    68.35x = 94.43 × 65.02
  4. Step 4: Simplify right side
    68.35x = 6,139.84
  5. Step 5: Solve for x
    x = 6,139.84/68.35
  6. Step 6: Final answer
    x = 89.83

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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.