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Finding the Fourth Proportional to 343,857.20, 515,858.70 and 103,951.40

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Solution

The fourth proportional to 343,857.20, 515,858.70 and 103,951.40 is: 155,949.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,857.20 : 515,858.70 = 103,951.40 : x
  2. Step 2: Convert to fraction form
    343,857.20/515,858.70 = 103,951.40/x
  3. Step 3: Cross multiply
    343,857.20x = 515,858.70 × 103,951.40
  4. Step 4: Simplify right side
    343,857.20x = 53,624,234,067.18
  5. Step 5: Solve for x
    x = 53,624,234,067.18/343,857.20
  6. Step 6: Final answer
    x = 155,949.14

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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.