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Finding the Fourth Proportional to 299,656,866.30, 449,515,237.05 and 81,310,674.30

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Solution

The fourth proportional to 299,656,866.30, 449,515,237.05 and 81,310,674.30 is: 121,974,134.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,656,866.30 : 449,515,237.05 = 81,310,674.30 : x
  2. Step 2: Convert to fraction form
    299,656,866.30/449,515,237.05 = 81,310,674.30/x
  3. Step 3: Cross multiply
    299,656,866.30x = 449,515,237.05 × 81,310,674.30
  4. Step 4: Simplify right side
    299,656,866.30x = 36,550,387,032,659,840
  5. Step 5: Solve for x
    x = 36,550,387,032,659,840/299,656,866.30
  6. Step 6: Final answer
    x = 121,974,134.90

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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.