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Finding the Fourth Proportional to 299,836.89, 449,754.93 and 78,220.89

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Solution

The fourth proportional to 299,836.89, 449,754.93 and 78,220.89 is: 117,331.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,836.89 : 449,754.93 = 78,220.89 : x
  2. Step 2: Convert to fraction form
    299,836.89/449,754.93 = 78,220.89/x
  3. Step 3: Cross multiply
    299,836.89x = 449,754.93 × 78,220.89
  4. Step 4: Simplify right side
    299,836.89x = 35,180,230,906.49
  5. Step 5: Solve for x
    x = 35,180,230,906.49/299,836.89
  6. Step 6: Final answer
    x = 117,331.23

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1.5x scale

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.