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Finding the Fourth Proportional to 61,609.71, 85,021.43 and 33,315.40

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Solution

The fourth proportional to 61,609.71, 85,021.43 and 33,315.40 is: 45,975.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,609.71 : 85,021.43 = 33,315.40 : x
  2. Step 2: Convert to fraction form
    61,609.71/85,021.43 = 33,315.40/x
  3. Step 3: Cross multiply
    61,609.71x = 85,021.43 × 33,315.40
  4. Step 4: Simplify right side
    61,609.71x = 2,832,522,523.91
  5. Step 5: Solve for x
    x = 2,832,522,523.91/61,609.71
  6. Step 6: Final answer
    x = 45,975.26

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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.