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Finding the Fourth Proportional to 206,014.08, 308,979.51 and 143,403.72

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Solution

The fourth proportional to 206,014.08, 308,979.51 and 143,403.72 is: 215,076.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,014.08 : 308,979.51 = 143,403.72 : x
  2. Step 2: Convert to fraction form
    206,014.08/308,979.51 = 143,403.72/x
  3. Step 3: Cross multiply
    206,014.08x = 308,979.51 × 143,403.72
  4. Step 4: Simplify right side
    206,014.08x = 44,308,810,247.99
  5. Step 5: Solve for x
    x = 44,308,810,247.99/206,014.08
  6. Step 6: Final answer
    x = 215,076.61

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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.