Home / 280,117.20-419,825.40-139,914.96

Finding the Fourth Proportional to 280,117.20, 419,825.40 and 139,914.96

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Solution

The fourth proportional to 280,117.20, 419,825.40 and 139,914.96 is: 209,697.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,117.20 : 419,825.40 = 139,914.96 : x
  2. Step 2: Convert to fraction form
    280,117.20/419,825.40 = 139,914.96/x
  3. Step 3: Cross multiply
    280,117.20x = 419,825.40 × 139,914.96
  4. Step 4: Simplify right side
    280,117.20x = 58,739,854,047.98
  5. Step 5: Solve for x
    x = 58,739,854,047.98/280,117.20
  6. Step 6: Final answer
    x = 209,697.42

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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.