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Finding the Fourth Proportional to 107,542.80, 161,119.80 and 91,990.80

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Solution

The fourth proportional to 107,542.80, 161,119.80 and 91,990.80 is: 137,819.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,542.80 : 161,119.80 = 91,990.80 : x
  2. Step 2: Convert to fraction form
    107,542.80/161,119.80 = 91,990.80/x
  3. Step 3: Cross multiply
    107,542.80x = 161,119.80 × 91,990.80
  4. Step 4: Simplify right side
    107,542.80x = 14,821,539,297.84
  5. Step 5: Solve for x
    x = 14,821,539,297.84/107,542.80
  6. Step 6: Final answer
    x = 137,819.91

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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.