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Finding the Fourth Proportional to 303,452.80, 455,179.20 and 78,811.46

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Solution

The fourth proportional to 303,452.80, 455,179.20 and 78,811.46 is: 118,217.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,452.80 : 455,179.20 = 78,811.46 : x
  2. Step 2: Convert to fraction form
    303,452.80/455,179.20 = 78,811.46/x
  3. Step 3: Cross multiply
    303,452.80x = 455,179.20 × 78,811.46
  4. Step 4: Simplify right side
    303,452.80x = 35,873,337,313.63
  5. Step 5: Solve for x
    x = 35,873,337,313.63/303,452.80
  6. Step 6: Final answer
    x = 118,217.19

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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.