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Finding the Fourth Proportional to 61,512.75, 84,863.30 and 38,843.28

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Solution

The fourth proportional to 61,512.75, 84,863.30 and 38,843.28 is: 53,588.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,512.75 : 84,863.30 = 38,843.28 : x
  2. Step 2: Convert to fraction form
    61,512.75/84,863.30 = 38,843.28/x
  3. Step 3: Cross multiply
    61,512.75x = 84,863.30 × 38,843.28
  4. Step 4: Simplify right side
    61,512.75x = 3,296,368,729.41
  5. Step 5: Solve for x
    x = 3,296,368,729.41/61,512.75
  6. Step 6: Final answer
    x = 53,588.38

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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.