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Finding the Fourth Proportional to 363,408.12, 545,114.52 and 126,749.88

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Solution

The fourth proportional to 363,408.12, 545,114.52 and 126,749.88 is: 190,125.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,408.12 : 545,114.52 = 126,749.88 : x
  2. Step 2: Convert to fraction form
    363,408.12/545,114.52 = 126,749.88/x
  3. Step 3: Cross multiply
    363,408.12x = 545,114.52 × 126,749.88
  4. Step 4: Simplify right side
    363,408.12x = 69,093,199,996.26
  5. Step 5: Solve for x
    x = 69,093,199,996.26/363,408.12
  6. Step 6: Final answer
    x = 190,125.64

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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.