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Finding the Fourth Proportional to 266,688,169.20, 400,054,372.20 and 84,930,217.20

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Solution

The fourth proportional to 266,688,169.20, 400,054,372.20 and 84,930,217.20 is: 127,402,369.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,688,169.20 : 400,054,372.20 = 84,930,217.20 : x
  2. Step 2: Convert to fraction form
    266,688,169.20/400,054,372.20 = 84,930,217.20/x
  3. Step 3: Cross multiply
    266,688,169.20x = 400,054,372.20 × 84,930,217.20
  4. Step 4: Simplify right side
    266,688,169.20x = 33,976,704,722,755,644
  5. Step 5: Solve for x
    x = 33,976,704,722,755,644/266,688,169.20
  6. Step 6: Final answer
    x = 127,402,369.68

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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.