Home / 81,383.27-122,629.39-66,916.26

Finding the Fourth Proportional to 81,383.27, 122,629.39 and 66,916.26

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Solution

The fourth proportional to 81,383.27, 122,629.39 and 66,916.26 is: 100,830.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,383.27 : 122,629.39 = 66,916.26 : x
  2. Step 2: Convert to fraction form
    81,383.27/122,629.39 = 66,916.26/x
  3. Step 3: Cross multiply
    81,383.27x = 122,629.39 × 66,916.26
  4. Step 4: Simplify right side
    81,383.27x = 8,205,899,977.59
  5. Step 5: Solve for x
    x = 8,205,899,977.59/81,383.27
  6. Step 6: Final answer
    x = 100,830.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.