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Finding the Fourth Proportional to 121,940.86, 168,284.92 and 68,222.66

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Solution

The fourth proportional to 121,940.86, 168,284.92 and 68,222.66 is: 94,150.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,940.86 : 168,284.92 = 68,222.66 : x
  2. Step 2: Convert to fraction form
    121,940.86/168,284.92 = 68,222.66/x
  3. Step 3: Cross multiply
    121,940.86x = 168,284.92 × 68,222.66
  4. Step 4: Simplify right side
    121,940.86x = 11,480,844,880.29
  5. Step 5: Solve for x
    x = 11,480,844,880.29/121,940.86
  6. Step 6: Final answer
    x = 94,150.93

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1.5x scale

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.