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Finding the Fourth Proportional to 299,657,268.80, 449,515,840.80 and 81,311,076.80

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Solution

The fourth proportional to 299,657,268.80, 449,515,840.80 and 81,311,076.80 is: 121,974,738.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,657,268.80 : 449,515,840.80 = 81,311,076.80 : x
  2. Step 2: Convert to fraction form
    299,657,268.80/449,515,840.80 = 81,311,076.80/x
  3. Step 3: Cross multiply
    299,657,268.80x = 449,515,840.80 × 81,311,076.80
  4. Step 4: Simplify right side
    299,657,268.80x = 36,550,617,054,105,376
  5. Step 5: Solve for x
    x = 36,550,617,054,105,376/299,657,268.80
  6. Step 6: Final answer
    x = 121,974,738.68

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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.