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Finding the Fourth Proportional to 203,138.38, 304,520.94 and 69,986.98

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Solution

The fourth proportional to 203,138.38, 304,520.94 and 69,986.98 is: 104,916.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,138.38 : 304,520.94 = 69,986.98 : x
  2. Step 2: Convert to fraction form
    203,138.38/304,520.94 = 69,986.98/x
  3. Step 3: Cross multiply
    203,138.38x = 304,520.94 × 69,986.98
  4. Step 4: Simplify right side
    203,138.38x = 21,312,500,937.36
  5. Step 5: Solve for x
    x = 21,312,500,937.36/203,138.38
  6. Step 6: Final answer
    x = 104,916.17

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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.