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Finding the Fourth Proportional to 57,352,561.80, 86,016,887.10 and 20,978,086.20

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Solution

The fourth proportional to 57,352,561.80, 86,016,887.10 and 20,978,086.20 is: 31,462,756.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,352,561.80 : 86,016,887.10 = 20,978,086.20 : x
  2. Step 2: Convert to fraction form
    57,352,561.80/86,016,887.10 = 20,978,086.20/x
  3. Step 3: Cross multiply
    57,352,561.80x = 86,016,887.10 × 20,978,086.20
  4. Step 4: Simplify right side
    57,352,561.80x = 1,804,469,672,239,467.75
  5. Step 5: Solve for x
    x = 1,804,469,672,239,467.75/57,352,561.80
  6. Step 6: Final answer
    x = 31,462,756.25

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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.