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Finding the Fourth Proportional to 206,618.80, 309,409.80 and 136,116.40

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Solution

The fourth proportional to 206,618.80, 309,409.80 and 136,116.40 is: 203,833.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,618.80 : 309,409.80 = 136,116.40 : x
  2. Step 2: Convert to fraction form
    206,618.80/309,409.80 = 136,116.40/x
  3. Step 3: Cross multiply
    206,618.80x = 309,409.80 × 136,116.40
  4. Step 4: Simplify right side
    206,618.80x = 42,115,748,100.72
  5. Step 5: Solve for x
    x = 42,115,748,100.72/206,618.80
  6. Step 6: Final answer
    x = 203,833.09

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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.