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Finding the Fourth Proportional to 139,979,707.20, 209,969,560.80 and 63,305,236.80

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Solution

The fourth proportional to 139,979,707.20, 209,969,560.80 and 63,305,236.80 is: 94,957,855.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,979,707.20 : 209,969,560.80 = 63,305,236.80 : x
  2. Step 2: Convert to fraction form
    139,979,707.20/209,969,560.80 = 63,305,236.80/x
  3. Step 3: Cross multiply
    139,979,707.20x = 209,969,560.80 × 63,305,236.80
  4. Step 4: Simplify right side
    139,979,707.20x = 13,292,172,767,235,998
  5. Step 5: Solve for x
    x = 13,292,172,767,235,998/139,979,707.20
  6. Step 6: Final answer
    x = 94,957,855.20

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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.