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Finding the Fourth Proportional to 121,786.44, 168,033.60 and 74,041.80

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Solution

The fourth proportional to 121,786.44, 168,033.60 and 74,041.80 is: 102,158.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,786.44 : 168,033.60 = 74,041.80 : x
  2. Step 2: Convert to fraction form
    121,786.44/168,033.60 = 74,041.80/x
  3. Step 3: Cross multiply
    121,786.44x = 168,033.60 × 74,041.80
  4. Step 4: Simplify right side
    121,786.44x = 12,441,510,204.48
  5. Step 5: Solve for x
    x = 12,441,510,204.48/121,786.44
  6. Step 6: Final answer
    x = 102,158.42

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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.