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Finding the Fourth Proportional to 71,403.39, 106,999.83 and 39,769.89

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Solution

The fourth proportional to 71,403.39, 106,999.83 and 39,769.89 is: 59,596.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,403.39 : 106,999.83 = 39,769.89 : x
  2. Step 2: Convert to fraction form
    71,403.39/106,999.83 = 39,769.89/x
  3. Step 3: Cross multiply
    71,403.39x = 106,999.83 × 39,769.89
  4. Step 4: Simplify right side
    71,403.39x = 4,255,371,469.12
  5. Step 5: Solve for x
    x = 4,255,371,469.12/71,403.39
  6. Step 6: Final answer
    x = 59,596.21

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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.