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Finding the Fourth Proportional to 66.66, 99.78 and 41.04

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Solution

The fourth proportional to 66.66, 99.78 and 41.04 is: 61.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.66 : 99.78 = 41.04 : x
  2. Step 2: Convert to fraction form
    66.66/99.78 = 41.04/x
  3. Step 3: Cross multiply
    66.66x = 99.78 × 41.04
  4. Step 4: Simplify right side
    66.66x = 4,094.97
  5. Step 5: Solve for x
    x = 4,094.97/66.66
  6. Step 6: Final answer
    x = 61.43

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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.