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Finding the Fourth Proportional to 66.86, 100.32 and 38.01

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Solution

The fourth proportional to 66.86, 100.32 and 38.01 is: 57.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.86 : 100.32 = 38.01 : x
  2. Step 2: Convert to fraction form
    66.86/100.32 = 38.01/x
  3. Step 3: Cross multiply
    66.86x = 100.32 × 38.01
  4. Step 4: Simplify right side
    66.86x = 3,813.16
  5. Step 5: Solve for x
    x = 3,813.16/66.86
  6. Step 6: Final answer
    x = 57.03

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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.