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Finding the Fourth Proportional to 57,701.70, 86,552.55 and 54,639.90

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Solution

The fourth proportional to 57,701.70, 86,552.55 and 54,639.90 is: 81,959.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,701.70 : 86,552.55 = 54,639.90 : x
  2. Step 2: Convert to fraction form
    57,701.70/86,552.55 = 54,639.90/x
  3. Step 3: Cross multiply
    57,701.70x = 86,552.55 × 54,639.90
  4. Step 4: Simplify right side
    57,701.70x = 4,729,222,676.75
  5. Step 5: Solve for x
    x = 4,729,222,676.75/57,701.70
  6. Step 6: Final answer
    x = 81,959.85

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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.