Home / 280,299.39-420,516.06-90,759.96

Finding the Fourth Proportional to 280,299.39, 420,516.06 and 90,759.96

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Solution

The fourth proportional to 280,299.39, 420,516.06 and 90,759.96 is: 136,161.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,299.39 : 420,516.06 = 90,759.96 : x
  2. Step 2: Convert to fraction form
    280,299.39/420,516.06 = 90,759.96/x
  3. Step 3: Cross multiply
    280,299.39x = 420,516.06 × 90,759.96
  4. Step 4: Simplify right side
    280,299.39x = 38,166,020,444.61
  5. Step 5: Solve for x
    x = 38,166,020,444.61/280,299.39
  6. Step 6: Final answer
    x = 136,161.63

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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.