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Finding the Fourth Proportional to 62,991.90, 86,906.61 and 40,334.58

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Solution

The fourth proportional to 62,991.90, 86,906.61 and 40,334.58 is: 55,647.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,991.90 : 86,906.61 = 40,334.58 : x
  2. Step 2: Convert to fraction form
    62,991.90/86,906.61 = 40,334.58/x
  3. Step 3: Cross multiply
    62,991.90x = 86,906.61 × 40,334.58
  4. Step 4: Simplify right side
    62,991.90x = 3,505,341,613.57
  5. Step 5: Solve for x
    x = 3,505,341,613.57/62,991.90
  6. Step 6: Final answer
    x = 55,647.50

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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.