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Finding the Fourth Proportional to 71,991.54, 99,348.53 and 40,162.46

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Solution

The fourth proportional to 71,991.54, 99,348.53 and 40,162.46 is: 55,424.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,991.54 : 99,348.53 = 40,162.46 : x
  2. Step 2: Convert to fraction form
    71,991.54/99,348.53 = 40,162.46/x
  3. Step 3: Cross multiply
    71,991.54x = 99,348.53 × 40,162.46
  4. Step 4: Simplify right side
    71,991.54x = 3,990,080,664.63
  5. Step 5: Solve for x
    x = 3,990,080,664.63/71,991.54
  6. Step 6: Final answer
    x = 55,424.30

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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.