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Finding the Fourth Proportional to 68.19, 94.28 and 61.35

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Solution

The fourth proportional to 68.19, 94.28 and 61.35 is: 84.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.19 : 94.28 = 61.35 : x
  2. Step 2: Convert to fraction form
    68.19/94.28 = 61.35/x
  3. Step 3: Cross multiply
    68.19x = 94.28 × 61.35
  4. Step 4: Simplify right side
    68.19x = 5,783.77
  5. Step 5: Solve for x
    x = 5,783.77/68.19
  6. Step 6: Final answer
    x = 84.82

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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.