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Finding the Fourth Proportional to 303,453.80, 455,180.70 and 78,812.46

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Solution

The fourth proportional to 303,453.80, 455,180.70 and 78,812.46 is: 118,218.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,453.80 : 455,180.70 = 78,812.46 : x
  2. Step 2: Convert to fraction form
    303,453.80/455,180.70 = 78,812.46/x
  3. Step 3: Cross multiply
    303,453.80x = 455,180.70 × 78,812.46
  4. Step 4: Simplify right side
    303,453.80x = 35,873,910,711.52
  5. Step 5: Solve for x
    x = 35,873,910,711.52/303,453.80
  6. Step 6: Final answer
    x = 118,218.69

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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.