Home / 121,115.40-167,138.08-67,399.52

Finding the Fourth Proportional to 121,115.40, 167,138.08 and 67,399.52

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Solution

The fourth proportional to 121,115.40, 167,138.08 and 67,399.52 is: 93,010.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,115.40 : 167,138.08 = 67,399.52 : x
  2. Step 2: Convert to fraction form
    121,115.40/167,138.08 = 67,399.52/x
  3. Step 3: Cross multiply
    121,115.40x = 167,138.08 × 67,399.52
  4. Step 4: Simplify right side
    121,115.40x = 11,265,026,365.72
  5. Step 5: Solve for x
    x = 11,265,026,365.72/121,115.40
  6. Step 6: Final answer
    x = 93,010.69

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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.