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Finding the Fourth Proportional to 206,997.80, 310,496.70 and 102,021.80

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Solution

The fourth proportional to 206,997.80, 310,496.70 and 102,021.80 is: 153,032.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,997.80 : 310,496.70 = 102,021.80 : x
  2. Step 2: Convert to fraction form
    206,997.80/310,496.70 = 102,021.80/x
  3. Step 3: Cross multiply
    206,997.80x = 310,496.70 × 102,021.80
  4. Step 4: Simplify right side
    206,997.80x = 31,677,432,228.06
  5. Step 5: Solve for x
    x = 31,677,432,228.06/206,997.80
  6. Step 6: Final answer
    x = 153,032.70

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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.