Home / 121,936.89-168,216.08-78,930.26

Finding the Fourth Proportional to 121,936.89, 168,216.08 and 78,930.26

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Solution

The fourth proportional to 121,936.89, 168,216.08 and 78,930.26 is: 108,886.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,936.89 : 168,216.08 = 78,930.26 : x
  2. Step 2: Convert to fraction form
    121,936.89/168,216.08 = 78,930.26/x
  3. Step 3: Cross multiply
    121,936.89x = 168,216.08 × 78,930.26
  4. Step 4: Simplify right side
    121,936.89x = 13,277,337,694.85
  5. Step 5: Solve for x
    x = 13,277,337,694.85/121,936.89
  6. Step 6: Final answer
    x = 108,886.96

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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.