Home / 420,084.96-629,937.90-120,496.80

Finding the Fourth Proportional to 420,084.96, 629,937.90 and 120,496.80

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Solution

The fourth proportional to 420,084.96, 629,937.90 and 120,496.80 is: 180,690.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,084.96 : 629,937.90 = 120,496.80 : x
  2. Step 2: Convert to fraction form
    420,084.96/629,937.90 = 120,496.80/x
  3. Step 3: Cross multiply
    420,084.96x = 629,937.90 × 120,496.80
  4. Step 4: Simplify right side
    420,084.96x = 75,905,501,148.72
  5. Step 5: Solve for x
    x = 75,905,501,148.72/420,084.96
  6. Step 6: Final answer
    x = 180,690.83

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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.