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Finding the Fourth Proportional to 119,893.78, 165,453.43 and 66,178.81

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Solution

The fourth proportional to 119,893.78, 165,453.43 and 66,178.81 is: 91,326.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,893.78 : 165,453.43 = 66,178.81 : x
  2. Step 2: Convert to fraction form
    119,893.78/165,453.43 = 66,178.81/x
  3. Step 3: Cross multiply
    119,893.78x = 165,453.43 × 66,178.81
  4. Step 4: Simplify right side
    119,893.78x = 10,949,510,776.92
  5. Step 5: Solve for x
    x = 10,949,510,776.92/119,893.78
  6. Step 6: Final answer
    x = 91,326.76

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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.