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Finding the Fourth Proportional to 189,144.35, 283,784.28 and 81,028.37

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Solution

The fourth proportional to 189,144.35, 283,784.28 and 81,028.37 is: 121,571.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,144.35 : 283,784.28 = 81,028.37 : x
  2. Step 2: Convert to fraction form
    189,144.35/283,784.28 = 81,028.37/x
  3. Step 3: Cross multiply
    189,144.35x = 283,784.28 × 81,028.37
  4. Step 4: Simplify right side
    189,144.35x = 22,994,576,221.10
  5. Step 5: Solve for x
    x = 22,994,576,221.10/189,144.35
  6. Step 6: Final answer
    x = 121,571.57

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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.