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Finding the Fourth Proportional to 56,905.30, 85,163.55 and 49,906.90

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Solution

The fourth proportional to 56,905.30, 85,163.55 and 49,906.90 is: 74,689.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,905.30 : 85,163.55 = 49,906.90 : x
  2. Step 2: Convert to fraction form
    56,905.30/85,163.55 = 49,906.90/x
  3. Step 3: Cross multiply
    56,905.30x = 85,163.55 × 49,906.90
  4. Step 4: Simplify right side
    56,905.30x = 4,250,248,773.50
  5. Step 5: Solve for x
    x = 4,250,248,773.50/56,905.30
  6. Step 6: Final answer
    x = 74,689.86

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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.