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Finding the Fourth Proportional to 78,832.70, 118,249.05 and 28,896.20

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Solution

The fourth proportional to 78,832.70, 118,249.05 and 28,896.20 is: 43,344.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,832.70 : 118,249.05 = 28,896.20 : x
  2. Step 2: Convert to fraction form
    78,832.70/118,249.05 = 28,896.20/x
  3. Step 3: Cross multiply
    78,832.70x = 118,249.05 × 28,896.20
  4. Step 4: Simplify right side
    78,832.70x = 3,416,948,198.61
  5. Step 5: Solve for x
    x = 3,416,948,198.61/78,832.70
  6. Step 6: Final answer
    x = 43,344.30

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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.