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Finding the Fourth Proportional to 61,079.76, 91,514.43 and 47,747.55

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Solution

The fourth proportional to 61,079.76, 91,514.43 and 47,747.55 is: 71,539.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,079.76 : 91,514.43 = 47,747.55 : x
  2. Step 2: Convert to fraction form
    61,079.76/91,514.43 = 47,747.55/x
  3. Step 3: Cross multiply
    61,079.76x = 91,514.43 × 47,747.55
  4. Step 4: Simplify right side
    61,079.76x = 4,369,589,822.15
  5. Step 5: Solve for x
    x = 4,369,589,822.15/61,079.76
  6. Step 6: Final answer
    x = 71,539.08

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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.