Home / 280,038.20-420,057.30-93,049.70

Finding the Fourth Proportional to 280,038.20, 420,057.30 and 93,049.70

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Solution

The fourth proportional to 280,038.20, 420,057.30 and 93,049.70 is: 139,574.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,038.20 : 420,057.30 = 93,049.70 : x
  2. Step 2: Convert to fraction form
    280,038.20/420,057.30 = 93,049.70/x
  3. Step 3: Cross multiply
    280,038.20x = 420,057.30 × 93,049.70
  4. Step 4: Simplify right side
    280,038.20x = 39,086,205,747.81
  5. Step 5: Solve for x
    x = 39,086,205,747.81/280,038.20
  6. Step 6: Final answer
    x = 139,574.55

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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.