Home / 420,083.20-629,935.26-120,495.79

Finding the Fourth Proportional to 420,083.20, 629,935.26 and 120,495.79

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Solution

The fourth proportional to 420,083.20, 629,935.26 and 120,495.79 is: 180,689.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,083.20 : 629,935.26 = 120,495.79 : x
  2. Step 2: Convert to fraction form
    420,083.20/629,935.26 = 120,495.79/x
  3. Step 3: Cross multiply
    420,083.20x = 629,935.26 × 120,495.79
  4. Step 4: Simplify right side
    420,083.20x = 75,904,546,802.56
  5. Step 5: Solve for x
    x = 75,904,546,802.56/420,083.20
  6. Step 6: Final answer
    x = 180,689.32

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1.5x scale

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.