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Finding the Fourth Proportional to 101,991.92, 153,015.55 and 30,911.69

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Solution

The fourth proportional to 101,991.92, 153,015.55 and 30,911.69 is: 46,375.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,991.92 : 153,015.55 = 30,911.69 : x
  2. Step 2: Convert to fraction form
    101,991.92/153,015.55 = 30,911.69/x
  3. Step 3: Cross multiply
    101,991.92x = 153,015.55 × 30,911.69
  4. Step 4: Simplify right side
    101,991.92x = 4,729,969,552.04
  5. Step 5: Solve for x
    x = 4,729,969,552.04/101,991.92
  6. Step 6: Final answer
    x = 46,375.93

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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.