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Finding the Fourth Proportional to 72,029.80, 107,958.30 and 36,951.40

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Solution

The fourth proportional to 72,029.80, 107,958.30 and 36,951.40 is: 55,382.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,029.80 : 107,958.30 = 36,951.40 : x
  2. Step 2: Convert to fraction form
    72,029.80/107,958.30 = 36,951.40/x
  3. Step 3: Cross multiply
    72,029.80x = 107,958.30 × 36,951.40
  4. Step 4: Simplify right side
    72,029.80x = 3,989,210,326.62
  5. Step 5: Solve for x
    x = 3,989,210,326.62/72,029.80
  6. Step 6: Final answer
    x = 55,382.78

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Why These Related Problems?

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