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Finding the Fourth Proportional to 57,881.31, 86,762.79 and 39,163.32

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Solution

The fourth proportional to 57,881.31, 86,762.79 and 39,163.32 is: 58,704.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,881.31 : 86,762.79 = 39,163.32 : x
  2. Step 2: Convert to fraction form
    57,881.31/86,762.79 = 39,163.32/x
  3. Step 3: Cross multiply
    57,881.31x = 86,762.79 × 39,163.32
  4. Step 4: Simplify right side
    57,881.31x = 3,397,918,908.86
  5. Step 5: Solve for x
    x = 3,397,918,908.86/57,881.31
  6. Step 6: Final answer
    x = 58,704.94

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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.