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Finding the Fourth Proportional to 66.62, 100.29 and 60

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Solution

The fourth proportional to 66.62, 100.29 and 60 is: 90.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.62 : 100.29 = 60 : x
  2. Step 2: Convert to fraction form
    66.62/100.29 = 60/x
  3. Step 3: Cross multiply
    66.62x = 100.29 × 60
  4. Step 4: Simplify right side
    66.62x = 6,017.40
  5. Step 5: Solve for x
    x = 6,017.40/66.62
  6. Step 6: Final answer
    x = 90.32

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.