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Finding the Fourth Proportional to 153,221.39, 211,359.11 and 91,951.91

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Solution

The fourth proportional to 153,221.39, 211,359.11 and 91,951.91 is: 126,841.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,221.39 : 211,359.11 = 91,951.91 : x
  2. Step 2: Convert to fraction form
    153,221.39/211,359.11 = 91,951.91/x
  3. Step 3: Cross multiply
    153,221.39x = 211,359.11 × 91,951.91
  4. Step 4: Simplify right side
    153,221.39x = 19,434,873,136.44
  5. Step 5: Solve for x
    x = 19,434,873,136.44/153,221.39
  6. Step 6: Final answer
    x = 126,841.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.