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Finding the Fourth Proportional to 72,121.38, 107,992.80 and 50,946.90

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Solution

The fourth proportional to 72,121.38, 107,992.80 and 50,946.90 is: 76,286.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,121.38 : 107,992.80 = 50,946.90 : x
  2. Step 2: Convert to fraction form
    72,121.38/107,992.80 = 50,946.90/x
  3. Step 3: Cross multiply
    72,121.38x = 107,992.80 × 50,946.90
  4. Step 4: Simplify right side
    72,121.38x = 5,501,898,382.32
  5. Step 5: Solve for x
    x = 5,501,898,382.32/72,121.38
  6. Step 6: Final answer
    x = 76,286.65

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1.5x scale

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.