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Finding the Fourth Proportional to 213,469.80, 319,859.10 and 134,442.60

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Solution

The fourth proportional to 213,469.80, 319,859.10 and 134,442.60 is: 201,446.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,469.80 : 319,859.10 = 134,442.60 : x
  2. Step 2: Convert to fraction form
    213,469.80/319,859.10 = 134,442.60/x
  3. Step 3: Cross multiply
    213,469.80x = 319,859.10 × 134,442.60
  4. Step 4: Simplify right side
    213,469.80x = 43,002,689,037.66
  5. Step 5: Solve for x
    x = 43,002,689,037.66/213,469.80
  6. Step 6: Final answer
    x = 201,446.24

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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.