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Finding the Fourth Proportional to 67,917.61, 93,716.80 and 40,687.39

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Solution

The fourth proportional to 67,917.61, 93,716.80 and 40,687.39 is: 56,142.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,917.61 : 93,716.80 = 40,687.39 : x
  2. Step 2: Convert to fraction form
    67,917.61/93,716.80 = 40,687.39/x
  3. Step 3: Cross multiply
    67,917.61x = 93,716.80 × 40,687.39
  4. Step 4: Simplify right side
    67,917.61x = 3,813,091,991.15
  5. Step 5: Solve for x
    x = 3,813,091,991.15/67,917.61
  6. Step 6: Final answer
    x = 56,142.91

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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.