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Finding the Fourth Proportional to 56,791.92, 85,240.32 and 28,731.72

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Solution

The fourth proportional to 56,791.92, 85,240.32 and 28,731.72 is: 43,124.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,791.92 : 85,240.32 = 28,731.72 : x
  2. Step 2: Convert to fraction form
    56,791.92/85,240.32 = 28,731.72/x
  3. Step 3: Cross multiply
    56,791.92x = 85,240.32 × 28,731.72
  4. Step 4: Simplify right side
    56,791.92x = 2,449,101,006.95
  5. Step 5: Solve for x
    x = 2,449,101,006.95/56,791.92
  6. Step 6: Final answer
    x = 43,124.11

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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.