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Finding the Fourth Proportional to 84,392,471.80, 126,588,707.70 and 80,991,249.40

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Solution

The fourth proportional to 84,392,471.80, 126,588,707.70 and 80,991,249.40 is: 121,486,874.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,392,471.80 : 126,588,707.70 = 80,991,249.40 : x
  2. Step 2: Convert to fraction form
    84,392,471.80/126,588,707.70 = 80,991,249.40/x
  3. Step 3: Cross multiply
    84,392,471.80x = 126,588,707.70 × 80,991,249.40
  4. Step 4: Simplify right side
    84,392,471.80x = 10,252,577,596,554,402
  5. Step 5: Solve for x
    x = 10,252,577,596,554,402/84,392,471.80
  6. Step 6: Final answer
    x = 121,486,874.10

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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.