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Finding the Fourth Proportional to 144,881.87, 199,936.86 and 81,219.67

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Solution

The fourth proportional to 144,881.87, 199,936.86 and 81,219.67 is: 112,083.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,881.87 : 199,936.86 = 81,219.67 : x
  2. Step 2: Convert to fraction form
    144,881.87/199,936.86 = 81,219.67/x
  3. Step 3: Cross multiply
    144,881.87x = 199,936.86 × 81,219.67
  4. Step 4: Simplify right side
    144,881.87x = 16,238,806,084.97
  5. Step 5: Solve for x
    x = 16,238,806,084.97/144,881.87
  6. Step 6: Final answer
    x = 112,083.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.