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Finding the Fourth Proportional to 61,494.48, 84,889.08 and 39,138.48

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Solution

The fourth proportional to 61,494.48, 84,889.08 and 39,138.48 is: 54,028.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,494.48 : 84,889.08 = 39,138.48 : x
  2. Step 2: Convert to fraction form
    61,494.48/84,889.08 = 39,138.48/x
  3. Step 3: Cross multiply
    61,494.48x = 84,889.08 × 39,138.48
  4. Step 4: Simplify right side
    61,494.48x = 3,322,429,559.80
  5. Step 5: Solve for x
    x = 3,322,429,559.80/61,494.48
  6. Step 6: Final answer
    x = 54,028.09

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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.