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Finding the Fourth Proportional to 72,189,382.80, 108,290,456.76 and 20,374,447.44

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Solution

The fourth proportional to 72,189,382.80, 108,290,456.76 and 20,374,447.44 is: 30,563,472.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,189,382.80 : 108,290,456.76 = 20,374,447.44 : x
  2. Step 2: Convert to fraction form
    72,189,382.80/108,290,456.76 = 20,374,447.44/x
  3. Step 3: Cross multiply
    72,189,382.80x = 108,290,456.76 × 20,374,447.44
  4. Step 4: Simplify right side
    72,189,382.80x = 2,206,358,219,510,213
  5. Step 5: Solve for x
    x = 2,206,358,219,510,213/72,189,382.80
  6. Step 6: Final answer
    x = 30,563,472.55

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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.