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Finding the Fourth Proportional to 61,672.92, 92,431.50 and 51,408.60

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Solution

The fourth proportional to 61,672.92, 92,431.50 and 51,408.60 is: 77,047.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,672.92 : 92,431.50 = 51,408.60 : x
  2. Step 2: Convert to fraction form
    61,672.92/92,431.50 = 51,408.60/x
  3. Step 3: Cross multiply
    61,672.92x = 92,431.50 × 51,408.60
  4. Step 4: Simplify right side
    61,672.92x = 4,751,774,010.90
  5. Step 5: Solve for x
    x = 4,751,774,010.90/61,672.92
  6. Step 6: Final answer
    x = 77,047.98

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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.