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Finding the Fourth Proportional to 206,479.70, 309,646.65 and 73,364.30

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Solution

The fourth proportional to 206,479.70, 309,646.65 and 73,364.30 is: 110,020.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,479.70 : 309,646.65 = 73,364.30 : x
  2. Step 2: Convert to fraction form
    206,479.70/309,646.65 = 73,364.30/x
  3. Step 3: Cross multiply
    206,479.70x = 309,646.65 × 73,364.30
  4. Step 4: Simplify right side
    206,479.70x = 22,717,009,724.60
  5. Step 5: Solve for x
    x = 22,717,009,724.60/206,479.70
  6. Step 6: Final answer
    x = 110,020.55

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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.