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Finding the Fourth Proportional to 43,714,979.80, 65,572,469.70 and 13,418,906.20

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Solution

The fourth proportional to 43,714,979.80, 65,572,469.70 and 13,418,906.20 is: 20,128,359.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,714,979.80 : 65,572,469.70 = 13,418,906.20 : x
  2. Step 2: Convert to fraction form
    43,714,979.80/65,572,469.70 = 13,418,906.20/x
  3. Step 3: Cross multiply
    43,714,979.80x = 65,572,469.70 × 13,418,906.20
  4. Step 4: Simplify right side
    43,714,979.80x = 879,910,820,206,642.12
  5. Step 5: Solve for x
    x = 879,910,820,206,642.12/43,714,979.80
  6. Step 6: Final answer
    x = 20,128,359.30

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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.