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Finding the Fourth Proportional to 303,539.85, 455,364.45 and 126,064.80

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Solution

The fourth proportional to 303,539.85, 455,364.45 and 126,064.80 is: 189,119.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,539.85 : 455,364.45 = 126,064.80 : x
  2. Step 2: Convert to fraction form
    303,539.85/455,364.45 = 126,064.80/x
  3. Step 3: Cross multiply
    303,539.85x = 455,364.45 × 126,064.80
  4. Step 4: Simplify right side
    303,539.85x = 57,405,428,316.36
  5. Step 5: Solve for x
    x = 57,405,428,316.36/303,539.85
  6. Step 6: Final answer
    x = 189,119.91

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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.