Home / 221,021.40-331,532.10-80,880.60

Finding the Fourth Proportional to 221,021.40, 331,532.10 and 80,880.60

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Solution

The fourth proportional to 221,021.40, 331,532.10 and 80,880.60 is: 121,320.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,021.40 : 331,532.10 = 80,880.60 : x
  2. Step 2: Convert to fraction form
    221,021.40/331,532.10 = 80,880.60/x
  3. Step 3: Cross multiply
    221,021.40x = 331,532.10 × 80,880.60
  4. Step 4: Simplify right side
    221,021.40x = 26,814,515,167.26
  5. Step 5: Solve for x
    x = 26,814,515,167.26/221,021.40
  6. Step 6: Final answer
    x = 121,320.90

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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.