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Finding the Fourth Proportional to 99,712.36, 149,443.81 and 49,806.39

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Solution

The fourth proportional to 99,712.36, 149,443.81 and 49,806.39 is: 74,647.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,712.36 : 149,443.81 = 49,806.39 : x
  2. Step 2: Convert to fraction form
    99,712.36/149,443.81 = 49,806.39/x
  3. Step 3: Cross multiply
    99,712.36x = 149,443.81 × 49,806.39
  4. Step 4: Simplify right side
    99,712.36x = 7,443,255,936.73
  5. Step 5: Solve for x
    x = 7,443,255,936.73/99,712.36
  6. Step 6: Final answer
    x = 74,647.28

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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.