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Finding the Fourth Proportional to 206,664, 309,998.88 and 58,920

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Solution

The fourth proportional to 206,664, 309,998.88 and 58,920 is: 88,380.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,664 : 309,998.88 = 58,920 : x
  2. Step 2: Convert to fraction form
    206,664/309,998.88 = 58,920/x
  3. Step 3: Cross multiply
    206,664x = 309,998.88 × 58,920
  4. Step 4: Simplify right side
    206,664x = 18,265,134,009.60
  5. Step 5: Solve for x
    x = 18,265,134,009.60/206,664
  6. Step 6: Final answer
    x = 88,380.82

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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.