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Finding the Fourth Proportional to 71,785.48, 99,051.78 and 39,949.96

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Solution

The fourth proportional to 71,785.48, 99,051.78 and 39,949.96 is: 55,124.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,785.48 : 99,051.78 = 39,949.96 : x
  2. Step 2: Convert to fraction form
    71,785.48/99,051.78 = 39,949.96/x
  3. Step 3: Cross multiply
    71,785.48x = 99,051.78 × 39,949.96
  4. Step 4: Simplify right side
    71,785.48x = 3,957,114,648.93
  5. Step 5: Solve for x
    x = 3,957,114,648.93/71,785.48
  6. Step 6: Final answer
    x = 55,124.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.