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Finding the Fourth Proportional to 68.06, 93.81 and 55.10

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Solution

The fourth proportional to 68.06, 93.81 and 55.10 is: 75.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.06 : 93.81 = 55.10 : x
  2. Step 2: Convert to fraction form
    68.06/93.81 = 55.10/x
  3. Step 3: Cross multiply
    68.06x = 93.81 × 55.10
  4. Step 4: Simplify right side
    68.06x = 5,168.93
  5. Step 5: Solve for x
    x = 5,168.93/68.06
  6. Step 6: Final answer
    x = 75.95

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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.