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Finding the Fourth Proportional to 299,811.60, 449,717.40 and 78,195.60

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Solution

The fourth proportional to 299,811.60, 449,717.40 and 78,195.60 is: 117,293.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,811.60 : 449,717.40 = 78,195.60 : x
  2. Step 2: Convert to fraction form
    299,811.60/449,717.40 = 78,195.60/x
  3. Step 3: Cross multiply
    299,811.60x = 449,717.40 × 78,195.60
  4. Step 4: Simplify right side
    299,811.60x = 35,165,921,923.44
  5. Step 5: Solve for x
    x = 35,165,921,923.44/299,811.60
  6. Step 6: Final answer
    x = 117,293.40

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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.