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Finding the Fourth Proportional to 205,850.40, 308,804.40 and 87,520.80

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Solution

The fourth proportional to 205,850.40, 308,804.40 and 87,520.80 is: 131,293.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,850.40 : 308,804.40 = 87,520.80 : x
  2. Step 2: Convert to fraction form
    205,850.40/308,804.40 = 87,520.80/x
  3. Step 3: Cross multiply
    205,850.40x = 308,804.40 × 87,520.80
  4. Step 4: Simplify right side
    205,850.40x = 27,026,808,131.52
  5. Step 5: Solve for x
    x = 27,026,808,131.52/205,850.40
  6. Step 6: Final answer
    x = 131,293.44

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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.