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Finding the Fourth Proportional to 206,149.28, 309,226.80 and 58,405.28

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Solution

The fourth proportional to 206,149.28, 309,226.80 and 58,405.28 is: 87,608.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,149.28 : 309,226.80 = 58,405.28 : x
  2. Step 2: Convert to fraction form
    206,149.28/309,226.80 = 58,405.28/x
  3. Step 3: Cross multiply
    206,149.28x = 309,226.80 × 58,405.28
  4. Step 4: Simplify right side
    206,149.28x = 18,060,477,837.50
  5. Step 5: Solve for x
    x = 18,060,477,837.50/206,149.28
  6. Step 6: Final answer
    x = 87,608.74

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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.