Home / 81,308.26-121,910.37-39,104.29

Finding the Fourth Proportional to 81,308.26, 121,910.37 and 39,104.29

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Solution

The fourth proportional to 81,308.26, 121,910.37 and 39,104.29 is: 58,631.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,308.26 : 121,910.37 = 39,104.29 : x
  2. Step 2: Convert to fraction form
    81,308.26/121,910.37 = 39,104.29/x
  3. Step 3: Cross multiply
    81,308.26x = 121,910.37 × 39,104.29
  4. Step 4: Simplify right side
    81,308.26x = 4,767,217,782.49
  5. Step 5: Solve for x
    x = 4,767,217,782.49/81,308.26
  6. Step 6: Final answer
    x = 58,631.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.