Home / 280,511.19-420,766.83-70,149.15

Finding the Fourth Proportional to 280,511.19, 420,766.83 and 70,149.15

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Solution

The fourth proportional to 280,511.19, 420,766.83 and 70,149.15 is: 105,223.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,511.19 : 420,766.83 = 70,149.15 : x
  2. Step 2: Convert to fraction form
    280,511.19/420,766.83 = 70,149.15/x
  3. Step 3: Cross multiply
    280,511.19x = 420,766.83 × 70,149.15
  4. Step 4: Simplify right side
    280,511.19x = 29,516,435,472.69
  5. Step 5: Solve for x
    x = 29,516,435,472.69/280,511.19
  6. Step 6: Final answer
    x = 105,223.74

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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.