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Finding the Fourth Proportional to 56,893.78, 78,513.42 and 31,743.28

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Solution

The fourth proportional to 56,893.78, 78,513.42 and 31,743.28 is: 43,805.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,893.78 : 78,513.42 = 31,743.28 : x
  2. Step 2: Convert to fraction form
    56,893.78/78,513.42 = 31,743.28/x
  3. Step 3: Cross multiply
    56,893.78x = 78,513.42 × 31,743.28
  4. Step 4: Simplify right side
    56,893.78x = 2,492,273,474.82
  5. Step 5: Solve for x
    x = 2,492,273,474.82/56,893.78
  6. Step 6: Final answer
    x = 43,805.73

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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.