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Finding the Fourth Proportional to 99,665.79, 149,044.19 and 74,383.17

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Solution

The fourth proportional to 99,665.79, 149,044.19 and 74,383.17 is: 111,235.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,665.79 : 149,044.19 = 74,383.17 : x
  2. Step 2: Convert to fraction form
    99,665.79/149,044.19 = 74,383.17/x
  3. Step 3: Cross multiply
    99,665.79x = 149,044.19 × 74,383.17
  4. Step 4: Simplify right side
    99,665.79x = 11,086,378,950.37
  5. Step 5: Solve for x
    x = 11,086,378,950.37/99,665.79
  6. Step 6: Final answer
    x = 111,235.55

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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.