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Finding the Fourth Proportional to 56,728.51, 84,944.13 and 39,997.96

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Solution

The fourth proportional to 56,728.51, 84,944.13 and 39,997.96 is: 59,892.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,728.51 : 84,944.13 = 39,997.96 : x
  2. Step 2: Convert to fraction form
    56,728.51/84,944.13 = 39,997.96/x
  3. Step 3: Cross multiply
    56,728.51x = 84,944.13 × 39,997.96
  4. Step 4: Simplify right side
    56,728.51x = 3,397,591,913.97
  5. Step 5: Solve for x
    x = 3,397,591,913.97/56,728.51
  6. Step 6: Final answer
    x = 59,892.14

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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.