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Finding the Fourth Proportional to 206,455.70, 309,610.65 and 73,340.30

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Solution

The fourth proportional to 206,455.70, 309,610.65 and 73,340.30 is: 109,984.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,455.70 : 309,610.65 = 73,340.30 : x
  2. Step 2: Convert to fraction form
    206,455.70/309,610.65 = 73,340.30/x
  3. Step 3: Cross multiply
    206,455.70x = 309,610.65 × 73,340.30
  4. Step 4: Simplify right side
    206,455.70x = 22,706,937,954.20
  5. Step 5: Solve for x
    x = 22,706,937,954.20/206,455.70
  6. Step 6: Final answer
    x = 109,984.55

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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.