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Finding the Fourth Proportional to 206,622.30, 309,933.45 and 139,700.10

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Solution

The fourth proportional to 206,622.30, 309,933.45 and 139,700.10 is: 209,550.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,622.30 : 309,933.45 = 139,700.10 : x
  2. Step 2: Convert to fraction form
    206,622.30/309,933.45 = 139,700.10/x
  3. Step 3: Cross multiply
    206,622.30x = 309,933.45 × 139,700.10
  4. Step 4: Simplify right side
    206,622.30x = 43,297,733,958.35
  5. Step 5: Solve for x
    x = 43,297,733,958.35/206,622.30
  6. Step 6: Final answer
    x = 209,550.15

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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.