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Finding the Fourth Proportional to 303,990.75, 456,009.03 and 90,741.81

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Solution

The fourth proportional to 303,990.75, 456,009.03 and 90,741.81 is: 136,119.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,990.75 : 456,009.03 = 90,741.81 : x
  2. Step 2: Convert to fraction form
    303,990.75/456,009.03 = 90,741.81/x
  3. Step 3: Cross multiply
    303,990.75x = 456,009.03 × 90,741.81
  4. Step 4: Simplify right side
    303,990.75x = 41,379,084,758.54
  5. Step 5: Solve for x
    x = 41,379,084,758.54/303,990.75
  6. Step 6: Final answer
    x = 136,119.55

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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.