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Finding the Fourth Proportional to 100,862.92, 139,188.31 and 55,540.54

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Solution

The fourth proportional to 100,862.92, 139,188.31 and 55,540.54 is: 76,644.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,862.92 : 139,188.31 = 55,540.54 : x
  2. Step 2: Convert to fraction form
    100,862.92/139,188.31 = 55,540.54/x
  3. Step 3: Cross multiply
    100,862.92x = 139,188.31 × 55,540.54
  4. Step 4: Simplify right side
    100,862.92x = 7,730,593,899.09
  5. Step 5: Solve for x
    x = 7,730,593,899.09/100,862.92
  6. Step 6: Final answer
    x = 76,644.56

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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.