Home / 280,316.43-420,535.25-90,795.87

Finding the Fourth Proportional to 280,316.43, 420,535.25 and 90,795.87

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Solution

The fourth proportional to 280,316.43, 420,535.25 and 90,795.87 is: 136,213.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,316.43 : 420,535.25 = 90,795.87 : x
  2. Step 2: Convert to fraction form
    280,316.43/420,535.25 = 90,795.87/x
  3. Step 3: Cross multiply
    280,316.43x = 420,535.25 × 90,795.87
  4. Step 4: Simplify right side
    280,316.43x = 38,182,863,435.44
  5. Step 5: Solve for x
    x = 38,182,863,435.44/280,316.43
  6. Step 6: Final answer
    x = 136,213.43

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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.