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Finding the Fourth Proportional to 71,790.58, 99,073.31 and 39,528.61

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Solution

The fourth proportional to 71,790.58, 99,073.31 and 39,528.61 is: 54,550.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,790.58 : 99,073.31 = 39,528.61 : x
  2. Step 2: Convert to fraction form
    71,790.58/99,073.31 = 39,528.61/x
  3. Step 3: Cross multiply
    71,790.58x = 99,073.31 × 39,528.61
  4. Step 4: Simplify right side
    71,790.58x = 3,916,230,288.06
  5. Step 5: Solve for x
    x = 3,916,230,288.06/71,790.58
  6. Step 6: Final answer
    x = 54,550.75

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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.