Home / 149,129.87-205,796.17-81,148.19

Finding the Fourth Proportional to 149,129.87, 205,796.17 and 81,148.19

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Solution

The fourth proportional to 149,129.87, 205,796.17 and 81,148.19 is: 111,982.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,129.87 : 205,796.17 = 81,148.19 : x
  2. Step 2: Convert to fraction form
    149,129.87/205,796.17 = 81,148.19/x
  3. Step 3: Cross multiply
    149,129.87x = 205,796.17 × 81,148.19
  4. Step 4: Simplify right side
    149,129.87x = 16,699,987,218.92
  5. Step 5: Solve for x
    x = 16,699,987,218.92/149,129.87
  6. Step 6: Final answer
    x = 111,982.84

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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.