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Finding the Fourth Proportional to 220,712.40, 331,068.60 and 80,475.60

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Solution

The fourth proportional to 220,712.40, 331,068.60 and 80,475.60 is: 120,713.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,712.40 : 331,068.60 = 80,475.60 : x
  2. Step 2: Convert to fraction form
    220,712.40/331,068.60 = 80,475.60/x
  3. Step 3: Cross multiply
    220,712.40x = 331,068.60 × 80,475.60
  4. Step 4: Simplify right side
    220,712.40x = 26,642,944,226.16
  5. Step 5: Solve for x
    x = 26,642,944,226.16/220,712.40
  6. Step 6: Final answer
    x = 120,713.40

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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.