Home / 420,087.96-629,945.64-120,500.28

Finding the Fourth Proportional to 420,087.96, 629,945.64 and 120,500.28

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Solution

The fourth proportional to 420,087.96, 629,945.64 and 120,500.28 is: 180,696.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,087.96 : 629,945.64 = 120,500.28 : x
  2. Step 2: Convert to fraction form
    420,087.96/629,945.64 = 120,500.28/x
  3. Step 3: Cross multiply
    420,087.96x = 629,945.64 × 120,500.28
  4. Step 4: Simplify right side
    420,087.96x = 75,908,626,004.78
  5. Step 5: Solve for x
    x = 75,908,626,004.78/420,087.96
  6. Step 6: Final answer
    x = 180,696.98

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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.