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Finding the Fourth Proportional to 206,728.60, 310,179.30 and 66,530.20

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Solution

The fourth proportional to 206,728.60, 310,179.30 and 66,530.20 is: 99,823.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,728.60 : 310,179.30 = 66,530.20 : x
  2. Step 2: Convert to fraction form
    206,728.60/310,179.30 = 66,530.20/x
  3. Step 3: Cross multiply
    206,728.60x = 310,179.30 × 66,530.20
  4. Step 4: Simplify right side
    206,728.60x = 20,636,290,864.86
  5. Step 5: Solve for x
    x = 20,636,290,864.86/206,728.60
  6. Step 6: Final answer
    x = 99,823.11

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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.