Home / 420,057.20-629,868.20-124,530.80

Finding the Fourth Proportional to 420,057.20, 629,868.20 and 124,530.80

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Solution

The fourth proportional to 420,057.20, 629,868.20 and 124,530.80 is: 186,731.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,057.20 : 629,868.20 = 124,530.80 : x
  2. Step 2: Convert to fraction form
    420,057.20/629,868.20 = 124,530.80/x
  3. Step 3: Cross multiply
    420,057.20x = 629,868.20 × 124,530.80
  4. Step 4: Simplify right side
    420,057.20x = 78,437,990,840.56
  5. Step 5: Solve for x
    x = 78,437,990,840.56/420,057.20
  6. Step 6: Final answer
    x = 186,731.69

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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.