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Finding the Fourth Proportional to 61,879.20, 92,709.45 and 57,942.60

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Solution

The fourth proportional to 61,879.20, 92,709.45 and 57,942.60 is: 86,811.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,879.20 : 92,709.45 = 57,942.60 : x
  2. Step 2: Convert to fraction form
    61,879.20/92,709.45 = 57,942.60/x
  3. Step 3: Cross multiply
    61,879.20x = 92,709.45 × 57,942.60
  4. Step 4: Simplify right side
    61,879.20x = 5,371,826,577.57
  5. Step 5: Solve for x
    x = 5,371,826,577.57/61,879.20
  6. Step 6: Final answer
    x = 86,811.51

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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.