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Finding the Fourth Proportional to 61,720.72, 85,174.51 and 33,426.52

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Solution

The fourth proportional to 61,720.72, 85,174.51 and 33,426.52 is: 46,128.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,720.72 : 85,174.51 = 33,426.52 : x
  2. Step 2: Convert to fraction form
    61,720.72/85,174.51 = 33,426.52/x
  3. Step 3: Cross multiply
    61,720.72x = 85,174.51 × 33,426.52
  4. Step 4: Simplify right side
    61,720.72x = 2,847,086,952.57
  5. Step 5: Solve for x
    x = 2,847,086,952.57/61,720.72
  6. Step 6: Final answer
    x = 46,128.55

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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.