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Finding the Fourth Proportional to 172,835.20, 259,317.60 and 67,729.60

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Solution

The fourth proportional to 172,835.20, 259,317.60 and 67,729.60 is: 101,619.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,835.20 : 259,317.60 = 67,729.60 : x
  2. Step 2: Convert to fraction form
    172,835.20/259,317.60 = 67,729.60/x
  3. Step 3: Cross multiply
    172,835.20x = 259,317.60 × 67,729.60
  4. Step 4: Simplify right side
    172,835.20x = 17,563,477,320.96
  5. Step 5: Solve for x
    x = 17,563,477,320.96/172,835.20
  6. Step 6: Final answer
    x = 101,619.79

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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.