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Finding the Fourth Proportional to 123,371.30, 185,063.53 and 39,138.20

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Solution

The fourth proportional to 123,371.30, 185,063.53 and 39,138.20 is: 58,709.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,371.30 : 185,063.53 = 39,138.20 : x
  2. Step 2: Convert to fraction form
    123,371.30/185,063.53 = 39,138.20/x
  3. Step 3: Cross multiply
    123,371.30x = 185,063.53 × 39,138.20
  4. Step 4: Simplify right side
    123,371.30x = 7,243,052,965.06
  5. Step 5: Solve for x
    x = 7,243,052,965.06/123,371.30
  6. Step 6: Final answer
    x = 58,709.38

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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.