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Finding the Fourth Proportional to 299,437.20, 449,155.80 and 89,047.80

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Solution

The fourth proportional to 299,437.20, 449,155.80 and 89,047.80 is: 133,571.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,437.20 : 449,155.80 = 89,047.80 : x
  2. Step 2: Convert to fraction form
    299,437.20/449,155.80 = 89,047.80/x
  3. Step 3: Cross multiply
    299,437.20x = 449,155.80 × 89,047.80
  4. Step 4: Simplify right side
    299,437.20x = 39,996,335,847.24
  5. Step 5: Solve for x
    x = 39,996,335,847.24/299,437.20
  6. Step 6: Final answer
    x = 133,571.70

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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.