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Finding the Fourth Proportional to 363,369.90, 545,091.15 and 138,919.15

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Solution

The fourth proportional to 363,369.90, 545,091.15 and 138,919.15 is: 208,392.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,369.90 : 545,091.15 = 138,919.15 : x
  2. Step 2: Convert to fraction form
    363,369.90/545,091.15 = 138,919.15/x
  3. Step 3: Cross multiply
    363,369.90x = 545,091.15 × 138,919.15
  4. Step 4: Simplify right side
    363,369.90x = 75,723,599,260.70
  5. Step 5: Solve for x
    x = 75,723,599,260.70/363,369.90
  6. Step 6: Final answer
    x = 208,392.60

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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.