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Finding the Fourth Proportional to 61,999.50, 92,999.31 and 20,446.50

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Solution

The fourth proportional to 61,999.50, 92,999.31 and 20,446.50 is: 30,669.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,999.50 : 92,999.31 = 20,446.50 : x
  2. Step 2: Convert to fraction form
    61,999.50/92,999.31 = 20,446.50/x
  3. Step 3: Cross multiply
    61,999.50x = 92,999.31 × 20,446.50
  4. Step 4: Simplify right side
    61,999.50x = 1,901,510,391.92
  5. Step 5: Solve for x
    x = 1,901,510,391.92/61,999.50
  6. Step 6: Final answer
    x = 30,669.77

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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.