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Finding the Fourth Proportional to 66,079.72, 91,190.67 and 35,865.31

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Solution

The fourth proportional to 66,079.72, 91,190.67 and 35,865.31 is: 49,494.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,079.72 : 91,190.67 = 35,865.31 : x
  2. Step 2: Convert to fraction form
    66,079.72/91,190.67 = 35,865.31/x
  3. Step 3: Cross multiply
    66,079.72x = 91,190.67 × 35,865.31
  4. Step 4: Simplify right side
    66,079.72x = 3,270,581,648.66
  5. Step 5: Solve for x
    x = 3,270,581,648.66/66,079.72
  6. Step 6: Final answer
    x = 49,494.48

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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.