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Finding the Fourth Proportional to 61,396.77, 84,679.54 and 39,893.44

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Solution

The fourth proportional to 61,396.77, 84,679.54 and 39,893.44 is: 55,021.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,396.77 : 84,679.54 = 39,893.44 : x
  2. Step 2: Convert to fraction form
    61,396.77/84,679.54 = 39,893.44/x
  3. Step 3: Cross multiply
    61,396.77x = 84,679.54 × 39,893.44
  4. Step 4: Simplify right side
    61,396.77x = 3,378,158,148.22
  5. Step 5: Solve for x
    x = 3,378,158,148.22/61,396.77
  6. Step 6: Final answer
    x = 55,021.76

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1.5x scale

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.