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Finding the Fourth Proportional to 81,965,793.40, 123,090,407.70 and 43,702,041.40

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Solution

The fourth proportional to 81,965,793.40, 123,090,407.70 and 43,702,041.40 is: 65,628,622.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,965,793.40 : 123,090,407.70 = 43,702,041.40 : x
  2. Step 2: Convert to fraction form
    81,965,793.40/123,090,407.70 = 43,702,041.40/x
  3. Step 3: Cross multiply
    81,965,793.40x = 123,090,407.70 × 43,702,041.40
  4. Step 4: Simplify right side
    81,965,793.40x = 5,379,302,093,248,279
  5. Step 5: Solve for x
    x = 5,379,302,093,248,279/81,965,793.40
  6. Step 6: Final answer
    x = 65,628,622.26

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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.