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Finding the Fourth Proportional to 220,967.16, 331,489.70 and 80,921.40

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Solution

The fourth proportional to 220,967.16, 331,489.70 and 80,921.40 is: 121,396.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,967.16 : 331,489.70 = 80,921.40 : x
  2. Step 2: Convert to fraction form
    220,967.16/331,489.70 = 80,921.40/x
  3. Step 3: Cross multiply
    220,967.16x = 331,489.70 × 80,921.40
  4. Step 4: Simplify right side
    220,967.16x = 26,824,610,609.58
  5. Step 5: Solve for x
    x = 26,824,610,609.58/220,967.16
  6. Step 6: Final answer
    x = 121,396.37

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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.