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Finding the Fourth Proportional to 67.71, 94.10 and 66.99

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Solution

The fourth proportional to 67.71, 94.10 and 66.99 is: 93.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.71 : 94.10 = 66.99 : x
  2. Step 2: Convert to fraction form
    67.71/94.10 = 66.99/x
  3. Step 3: Cross multiply
    67.71x = 94.10 × 66.99
  4. Step 4: Simplify right side
    67.71x = 6,303.93
  5. Step 5: Solve for x
    x = 6,303.93/67.71
  6. Step 6: Final answer
    x = 93.10

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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.