Home / 280,314.62-420,513.54-90,711.44

Finding the Fourth Proportional to 280,314.62, 420,513.54 and 90,711.44

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Solution

The fourth proportional to 280,314.62, 420,513.54 and 90,711.44 is: 136,080.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,314.62 : 420,513.54 = 90,711.44 : x
  2. Step 2: Convert to fraction form
    280,314.62/420,513.54 = 90,711.44/x
  3. Step 3: Cross multiply
    280,314.62x = 420,513.54 × 90,711.44
  4. Step 4: Simplify right side
    280,314.62x = 38,145,388,752.90
  5. Step 5: Solve for x
    x = 38,145,388,752.90/280,314.62
  6. Step 6: Final answer
    x = 136,080.63

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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.