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Finding the Fourth Proportional to 68.35, 94.28 and 64.20

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Solution

The fourth proportional to 68.35, 94.28 and 64.20 is: 88.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.35 : 94.28 = 64.20 : x
  2. Step 2: Convert to fraction form
    68.35/94.28 = 64.20/x
  3. Step 3: Cross multiply
    68.35x = 94.28 × 64.20
  4. Step 4: Simplify right side
    68.35x = 6,052.46
  5. Step 5: Solve for x
    x = 6,052.46/68.35
  6. Step 6: Final answer
    x = 88.55

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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.