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Finding the Fourth Proportional to 121,321.40, 181,982.10 and 104,408.60

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Solution

The fourth proportional to 121,321.40, 181,982.10 and 104,408.60 is: 156,612.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,321.40 : 181,982.10 = 104,408.60 : x
  2. Step 2: Convert to fraction form
    121,321.40/181,982.10 = 104,408.60/x
  3. Step 3: Cross multiply
    121,321.40x = 181,982.10 × 104,408.60
  4. Step 4: Simplify right side
    121,321.40x = 19,000,496,286.06
  5. Step 5: Solve for x
    x = 19,000,496,286.06/121,321.40
  6. Step 6: Final answer
    x = 156,612.90

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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.