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Finding the Fourth Proportional to 206,612.64, 309,908.03 and 66,360.33

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Solution

The fourth proportional to 206,612.64, 309,908.03 and 66,360.33 is: 99,536.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,612.64 : 309,908.03 = 66,360.33 : x
  2. Step 2: Convert to fraction form
    206,612.64/309,908.03 = 66,360.33/x
  3. Step 3: Cross multiply
    206,612.64x = 309,908.03 × 66,360.33
  4. Step 4: Simplify right side
    206,612.64x = 20,565,598,808.65
  5. Step 5: Solve for x
    x = 20,565,598,808.65/206,612.64
  6. Step 6: Final answer
    x = 99,536.98

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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.