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Finding the Fourth Proportional to 331,325.10, 496,987.65 and 120,969.90

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Solution

The fourth proportional to 331,325.10, 496,987.65 and 120,969.90 is: 181,454.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,325.10 : 496,987.65 = 120,969.90 : x
  2. Step 2: Convert to fraction form
    331,325.10/496,987.65 = 120,969.90/x
  3. Step 3: Cross multiply
    331,325.10x = 496,987.65 × 120,969.90
  4. Step 4: Simplify right side
    331,325.10x = 60,120,546,321.74
  5. Step 5: Solve for x
    x = 60,120,546,321.74/331,325.10
  6. Step 6: Final answer
    x = 181,454.85

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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.