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Finding the Fourth Proportional to 261,996.71, 393,071.61 and 84,499.79

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Solution

The fourth proportional to 261,996.71, 393,071.61 and 84,499.79 is: 126,774.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,996.71 : 393,071.61 = 84,499.79 : x
  2. Step 2: Convert to fraction form
    261,996.71/393,071.61 = 84,499.79/x
  3. Step 3: Cross multiply
    261,996.71x = 393,071.61 × 84,499.79
  4. Step 4: Simplify right side
    261,996.71x = 33,214,468,499.96
  5. Step 5: Solve for x
    x = 33,214,468,499.96/261,996.71
  6. Step 6: Final answer
    x = 126,774.37

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Similar ratio
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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.