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Finding the Fourth Proportional to 200,070.36, 300,105.82 and 81,741.80

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Solution

The fourth proportional to 200,070.36, 300,105.82 and 81,741.80 is: 122,612.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,070.36 : 300,105.82 = 81,741.80 : x
  2. Step 2: Convert to fraction form
    200,070.36/300,105.82 = 81,741.80/x
  3. Step 3: Cross multiply
    200,070.36x = 300,105.82 × 81,741.80
  4. Step 4: Simplify right side
    200,070.36x = 24,531,189,917.28
  5. Step 5: Solve for x
    x = 24,531,189,917.28/200,070.36
  6. Step 6: Final answer
    x = 122,612.81

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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.