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Finding the Fourth Proportional to 61,120.42, 91,716.37 and 25,578.77

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Solution

The fourth proportional to 61,120.42, 91,716.37 and 25,578.77 is: 38,383.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,120.42 : 91,716.37 = 25,578.77 : x
  2. Step 2: Convert to fraction form
    61,120.42/91,716.37 = 25,578.77/x
  3. Step 3: Cross multiply
    61,120.42x = 91,716.37 × 25,578.77
  4. Step 4: Simplify right side
    61,120.42x = 2,345,991,410.94
  5. Step 5: Solve for x
    x = 2,345,991,410.94/61,120.42
  6. Step 6: Final answer
    x = 38,383.11

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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.