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Finding the Fourth Proportional to 121,923, 182,718.45 and 68,640.39

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Solution

The fourth proportional to 121,923, 182,718.45 and 68,640.39 is: 102,867.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,923 : 182,718.45 = 68,640.39 : x
  2. Step 2: Convert to fraction form
    121,923/182,718.45 = 68,640.39/x
  3. Step 3: Cross multiply
    121,923x = 182,718.45 × 68,640.39
  4. Step 4: Simplify right side
    121,923x = 12,541,865,668.20
  5. Step 5: Solve for x
    x = 12,541,865,668.20/121,923
  6. Step 6: Final answer
    x = 102,867.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.