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Finding the Fourth Proportional to 72,517.77, 100,072.98 and 40,250.51

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Solution

The fourth proportional to 72,517.77, 100,072.98 and 40,250.51 is: 55,544.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,517.77 : 100,072.98 = 40,250.51 : x
  2. Step 2: Convert to fraction form
    72,517.77/100,072.98 = 40,250.51/x
  3. Step 3: Cross multiply
    72,517.77x = 100,072.98 × 40,250.51
  4. Step 4: Simplify right side
    72,517.77x = 4,027,988,398.61
  5. Step 5: Solve for x
    x = 4,027,988,398.61/72,517.77
  6. Step 6: Final answer
    x = 55,544.84

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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.