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Finding the Fourth Proportional to 68.11, 94.43 and 64.19

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Solution

The fourth proportional to 68.11, 94.43 and 64.19 is: 89.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.11 : 94.43 = 64.19 : x
  2. Step 2: Convert to fraction form
    68.11/94.43 = 64.19/x
  3. Step 3: Cross multiply
    68.11x = 94.43 × 64.19
  4. Step 4: Simplify right side
    68.11x = 6,061.86
  5. Step 5: Solve for x
    x = 6,061.86/68.11
  6. Step 6: Final answer
    x = 89.00

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.