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Finding the Fourth Proportional to 363,436.36, 545,245.26 and 126,781

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Solution

The fourth proportional to 363,436.36, 545,245.26 and 126,781 is: 190,203.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,436.36 : 545,245.26 = 126,781 : x
  2. Step 2: Convert to fraction form
    363,436.36/545,245.26 = 126,781/x
  3. Step 3: Cross multiply
    363,436.36x = 545,245.26 × 126,781
  4. Step 4: Simplify right side
    363,436.36x = 69,126,739,308.06
  5. Step 5: Solve for x
    x = 69,126,739,308.06/363,436.36
  6. Step 6: Final answer
    x = 190,203.15

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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.