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Finding the Fourth Proportional to 66.69, 92.07 and 48.20

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Solution

The fourth proportional to 66.69, 92.07 and 48.20 is: 66.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.69 : 92.07 = 48.20 : x
  2. Step 2: Convert to fraction form
    66.69/92.07 = 48.20/x
  3. Step 3: Cross multiply
    66.69x = 92.07 × 48.20
  4. Step 4: Simplify right side
    66.69x = 4,437.31
  5. Step 5: Solve for x
    x = 4,437.31/66.69
  6. Step 6: Final answer
    x = 66.54

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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.