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Finding the Fourth Proportional to 66.57, 91.94 and 54.33

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Solution

The fourth proportional to 66.57, 91.94 and 54.33 is: 75.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.57 : 91.94 = 54.33 : x
  2. Step 2: Convert to fraction form
    66.57/91.94 = 54.33/x
  3. Step 3: Cross multiply
    66.57x = 91.94 × 54.33
  4. Step 4: Simplify right side
    66.57x = 4,994.83
  5. Step 5: Solve for x
    x = 4,994.83/66.57
  6. Step 6: Final answer
    x = 75.03

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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.