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Finding the Fourth Proportional to 220,117.20, 330,175.80 and 79,857.60

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Solution

The fourth proportional to 220,117.20, 330,175.80 and 79,857.60 is: 119,786.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,117.20 : 330,175.80 = 79,857.60 : x
  2. Step 2: Convert to fraction form
    220,117.20/330,175.80 = 79,857.60/x
  3. Step 3: Cross multiply
    220,117.20x = 330,175.80 × 79,857.60
  4. Step 4: Simplify right side
    220,117.20x = 26,367,046,966.08
  5. Step 5: Solve for x
    x = 26,367,046,966.08/220,117.20
  6. Step 6: Final answer
    x = 119,786.40

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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.