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Finding the Fourth Proportional to 78,832.80, 118,249.20 and 23,428.80

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Solution

The fourth proportional to 78,832.80, 118,249.20 and 23,428.80 is: 35,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,832.80 : 118,249.20 = 23,428.80 : x
  2. Step 2: Convert to fraction form
    78,832.80/118,249.20 = 23,428.80/x
  3. Step 3: Cross multiply
    78,832.80x = 118,249.20 × 23,428.80
  4. Step 4: Simplify right side
    78,832.80x = 2,770,436,856.96
  5. Step 5: Solve for x
    x = 2,770,436,856.96/78,832.80
  6. Step 6: Final answer
    x = 35,143.20

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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.