Home / 280,823.70-421,235.55-81,150.60

Finding the Fourth Proportional to 280,823.70, 421,235.55 and 81,150.60

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Solution

The fourth proportional to 280,823.70, 421,235.55 and 81,150.60 is: 121,725.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,823.70 : 421,235.55 = 81,150.60 : x
  2. Step 2: Convert to fraction form
    280,823.70/421,235.55 = 81,150.60/x
  3. Step 3: Cross multiply
    280,823.70x = 421,235.55 × 81,150.60
  4. Step 4: Simplify right side
    280,823.70x = 34,183,517,623.83
  5. Step 5: Solve for x
    x = 34,183,517,623.83/280,823.70
  6. Step 6: Final answer
    x = 121,725.90

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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.