Home / 279,738.03-419,666.85-90,209.19

Finding the Fourth Proportional to 279,738.03, 419,666.85 and 90,209.19

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Solution

The fourth proportional to 279,738.03, 419,666.85 and 90,209.19 is: 135,333.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,738.03 : 419,666.85 = 90,209.19 : x
  2. Step 2: Convert to fraction form
    279,738.03/419,666.85 = 90,209.19/x
  3. Step 3: Cross multiply
    279,738.03x = 419,666.85 × 90,209.19
  4. Step 4: Simplify right side
    279,738.03x = 37,857,807,928.39
  5. Step 5: Solve for x
    x = 37,857,807,928.39/279,738.03
  6. Step 6: Final answer
    x = 135,333.08

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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.