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Finding the Fourth Proportional to 66.02, 98.91 and 40.35

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Solution

The fourth proportional to 66.02, 98.91 and 40.35 is: 60.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.02 : 98.91 = 40.35 : x
  2. Step 2: Convert to fraction form
    66.02/98.91 = 40.35/x
  3. Step 3: Cross multiply
    66.02x = 98.91 × 40.35
  4. Step 4: Simplify right side
    66.02x = 3,991.02
  5. Step 5: Solve for x
    x = 3,991.02/66.02
  6. Step 6: Final answer
    x = 60.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.