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Finding the Fourth Proportional to 206,072.40, 309,108.60 and 100,837.20

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Solution

The fourth proportional to 206,072.40, 309,108.60 and 100,837.20 is: 151,255.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,072.40 : 309,108.60 = 100,837.20 : x
  2. Step 2: Convert to fraction form
    206,072.40/309,108.60 = 100,837.20/x
  3. Step 3: Cross multiply
    206,072.40x = 309,108.60 × 100,837.20
  4. Step 4: Simplify right side
    206,072.40x = 31,169,645,719.92
  5. Step 5: Solve for x
    x = 31,169,645,719.92/206,072.40
  6. Step 6: Final answer
    x = 151,255.80

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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.