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Finding the Fourth Proportional to 73,986,976.80, 110,885,986.80 and 56,862,766.80

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Solution

The fourth proportional to 73,986,976.80, 110,885,986.80 and 56,862,766.80 is: 85,221,538.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,986,976.80 : 110,885,986.80 = 56,862,766.80 : x
  2. Step 2: Convert to fraction form
    73,986,976.80/110,885,986.80 = 56,862,766.80/x
  3. Step 3: Cross multiply
    73,986,976.80x = 110,885,986.80 × 56,862,766.80
  4. Step 4: Simplify right side
    73,986,976.80x = 6,305,284,008,796,278
  5. Step 5: Solve for x
    x = 6,305,284,008,796,278/73,986,976.80
  6. Step 6: Final answer
    x = 85,221,538.73

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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.