Home / 121,917.12-168,238.85-68,191.76

Finding the Fourth Proportional to 121,917.12, 168,238.85 and 68,191.76

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Solution

The fourth proportional to 121,917.12, 168,238.85 and 68,191.76 is: 94,100.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,917.12 : 168,238.85 = 68,191.76 : x
  2. Step 2: Convert to fraction form
    121,917.12/168,238.85 = 68,191.76/x
  3. Step 3: Cross multiply
    121,917.12x = 168,238.85 × 68,191.76
  4. Step 4: Simplify right side
    121,917.12x = 11,472,502,099.72
  5. Step 5: Solve for x
    x = 11,472,502,099.72/121,917.12
  6. Step 6: Final answer
    x = 94,100.83

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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.