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Finding the Fourth Proportional to 68,978.28, 103,433.56 and 31,039.30

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Solution

The fourth proportional to 68,978.28, 103,433.56 and 31,039.30 is: 46,543.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,978.28 : 103,433.56 = 31,039.30 : x
  2. Step 2: Convert to fraction form
    68,978.28/103,433.56 = 31,039.30/x
  3. Step 3: Cross multiply
    68,978.28x = 103,433.56 × 31,039.30
  4. Step 4: Simplify right side
    68,978.28x = 3,210,505,350.60
  5. Step 5: Solve for x
    x = 3,210,505,350.60/68,978.28
  6. Step 6: Final answer
    x = 46,543.71

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.