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Finding the Fourth Proportional to 61,673, 85,108.74 and 33,378.90

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Solution

The fourth proportional to 61,673, 85,108.74 and 33,378.90 is: 46,062.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,673 : 85,108.74 = 33,378.90 : x
  2. Step 2: Convert to fraction form
    61,673/85,108.74 = 33,378.90/x
  3. Step 3: Cross multiply
    61,673x = 85,108.74 × 33,378.90
  4. Step 4: Simplify right side
    61,673x = 2,840,836,121.59
  5. Step 5: Solve for x
    x = 2,840,836,121.59/61,673
  6. Step 6: Final answer
    x = 46,062.88

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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.