Home / 78,450.09-108,261.97-42,640.09

Finding the Fourth Proportional to 78,450.09, 108,261.97 and 42,640.09

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Solution

The fourth proportional to 78,450.09, 108,261.97 and 42,640.09 is: 58,843.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,450.09 : 108,261.97 = 42,640.09 : x
  2. Step 2: Convert to fraction form
    78,450.09/108,261.97 = 42,640.09/x
  3. Step 3: Cross multiply
    78,450.09x = 108,261.97 × 42,640.09
  4. Step 4: Simplify right side
    78,450.09x = 4,616,299,767.12
  5. Step 5: Solve for x
    x = 4,616,299,767.12/78,450.09
  6. Step 6: Final answer
    x = 58,843.78

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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.