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Finding the Fourth Proportional to 206,656.20, 309,984.30 and 135,797.40

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Solution

The fourth proportional to 206,656.20, 309,984.30 and 135,797.40 is: 203,696.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,656.20 : 309,984.30 = 135,797.40 : x
  2. Step 2: Convert to fraction form
    206,656.20/309,984.30 = 135,797.40/x
  3. Step 3: Cross multiply
    206,656.20x = 309,984.30 × 135,797.40
  4. Step 4: Simplify right side
    206,656.20x = 42,095,061,980.82
  5. Step 5: Solve for x
    x = 42,095,061,980.82/206,656.20
  6. Step 6: Final answer
    x = 203,696.10

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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.