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Finding the Fourth Proportional to 206,616.40, 309,924.60 and 122,635.60

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Solution

The fourth proportional to 206,616.40, 309,924.60 and 122,635.60 is: 183,953.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,616.40 : 309,924.60 = 122,635.60 : x
  2. Step 2: Convert to fraction form
    206,616.40/309,924.60 = 122,635.60/x
  3. Step 3: Cross multiply
    206,616.40x = 309,924.60 × 122,635.60
  4. Step 4: Simplify right side
    206,616.40x = 38,007,789,275.76
  5. Step 5: Solve for x
    x = 38,007,789,275.76/206,616.40
  6. Step 6: Final answer
    x = 183,953.40

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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.