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Finding the Fourth Proportional to 68.07, 93.39 and 66.35

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Solution

The fourth proportional to 68.07, 93.39 and 66.35 is: 91.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.07 : 93.39 = 66.35 : x
  2. Step 2: Convert to fraction form
    68.07/93.39 = 66.35/x
  3. Step 3: Cross multiply
    68.07x = 93.39 × 66.35
  4. Step 4: Simplify right side
    68.07x = 6,196.41
  5. Step 5: Solve for x
    x = 6,196.41/68.07
  6. Step 6: Final answer
    x = 91.02

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.