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Finding the Fourth Proportional to 221,016.40, 331,524.60 and 80,875.60

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Solution

The fourth proportional to 221,016.40, 331,524.60 and 80,875.60 is: 121,313.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,016.40 : 331,524.60 = 80,875.60 : x
  2. Step 2: Convert to fraction form
    221,016.40/331,524.60 = 80,875.60/x
  3. Step 3: Cross multiply
    221,016.40x = 331,524.60 × 80,875.60
  4. Step 4: Simplify right side
    221,016.40x = 26,812,250,939.76
  5. Step 5: Solve for x
    x = 26,812,250,939.76/221,016.40
  6. Step 6: Final answer
    x = 121,313.40

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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.