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Finding the Fourth Proportional to 85,410.40, 128,212.80 and 50,369.80

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Solution

The fourth proportional to 85,410.40, 128,212.80 and 50,369.80 is: 75,612.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,410.40 : 128,212.80 = 50,369.80 : x
  2. Step 2: Convert to fraction form
    85,410.40/128,212.80 = 50,369.80/x
  3. Step 3: Cross multiply
    85,410.40x = 128,212.80 × 50,369.80
  4. Step 4: Simplify right side
    85,410.40x = 6,458,053,093.44
  5. Step 5: Solve for x
    x = 6,458,053,093.44/85,410.40
  6. Step 6: Final answer
    x = 75,612.02

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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.