Home / 121,757.09-167,916-76,439.30

Finding the Fourth Proportional to 121,757.09, 167,916 and 76,439.30

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Solution

The fourth proportional to 121,757.09, 167,916 and 76,439.30 is: 105,417.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,757.09 : 167,916 = 76,439.30 : x
  2. Step 2: Convert to fraction form
    121,757.09/167,916 = 76,439.30/x
  3. Step 3: Cross multiply
    121,757.09x = 167,916 × 76,439.30
  4. Step 4: Simplify right side
    121,757.09x = 12,835,380,659.22
  5. Step 5: Solve for x
    x = 12,835,380,659.22/121,757.09
  6. Step 6: Final answer
    x = 105,417.94

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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.