Home / 221,085.20-331,627.80-131,272.40

Finding the Fourth Proportional to 221,085.20, 331,627.80 and 131,272.40

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Solution

The fourth proportional to 221,085.20, 331,627.80 and 131,272.40 is: 196,908.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,085.20 : 331,627.80 = 131,272.40 : x
  2. Step 2: Convert to fraction form
    221,085.20/331,627.80 = 131,272.40/x
  3. Step 3: Cross multiply
    221,085.20x = 331,627.80 × 131,272.40
  4. Step 4: Simplify right side
    221,085.20x = 43,533,577,212.72
  5. Step 5: Solve for x
    x = 43,533,577,212.72/221,085.20
  6. Step 6: Final answer
    x = 196,908.60

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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.