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Finding the Fourth Proportional to 66,488.78, 91,745.42 and 38,194.46

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Solution

The fourth proportional to 66,488.78, 91,745.42 and 38,194.46 is: 52,703.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,488.78 : 91,745.42 = 38,194.46 : x
  2. Step 2: Convert to fraction form
    66,488.78/91,745.42 = 38,194.46/x
  3. Step 3: Cross multiply
    66,488.78x = 91,745.42 × 38,194.46
  4. Step 4: Simplify right side
    66,488.78x = 3,504,166,774.37
  5. Step 5: Solve for x
    x = 3,504,166,774.37/66,488.78
  6. Step 6: Final answer
    x = 52,703.13

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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.