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Finding the Fourth Proportional to 103,137.97, 154,721.78 and 39,119.66

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Solution

The fourth proportional to 103,137.97, 154,721.78 and 39,119.66 is: 58,685.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,137.97 : 154,721.78 = 39,119.66 : x
  2. Step 2: Convert to fraction form
    103,137.97/154,721.78 = 39,119.66/x
  3. Step 3: Cross multiply
    103,137.97x = 154,721.78 × 39,119.66
  4. Step 4: Simplify right side
    103,137.97x = 6,052,663,428.19
  5. Step 5: Solve for x
    x = 6,052,663,428.19/103,137.97
  6. Step 6: Final answer
    x = 58,685.11

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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.