Home / 280,245.91-420,435.56-90,706.27

Finding the Fourth Proportional to 280,245.91, 420,435.56 and 90,706.27

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Solution

The fourth proportional to 280,245.91, 420,435.56 and 90,706.27 is: 136,080.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,245.91 : 420,435.56 = 90,706.27 : x
  2. Step 2: Convert to fraction form
    280,245.91/420,435.56 = 90,706.27/x
  3. Step 3: Cross multiply
    280,245.91x = 420,435.56 × 90,706.27
  4. Step 4: Simplify right side
    280,245.91x = 38,136,141,422.96
  5. Step 5: Solve for x
    x = 38,136,141,422.96/280,245.91
  6. Step 6: Final answer
    x = 136,080.99

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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.