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Finding the Fourth Proportional to 231,603.20, 347,145.60 and 131,811.20

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Solution

The fourth proportional to 231,603.20, 347,145.60 and 131,811.20 is: 197,569.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,603.20 : 347,145.60 = 131,811.20 : x
  2. Step 2: Convert to fraction form
    231,603.20/347,145.60 = 131,811.20/x
  3. Step 3: Cross multiply
    231,603.20x = 347,145.60 × 131,811.20
  4. Step 4: Simplify right side
    231,603.20x = 45,757,678,110.72
  5. Step 5: Solve for x
    x = 45,757,678,110.72/231,603.20
  6. Step 6: Final answer
    x = 197,569.28

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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.