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Finding the Fourth Proportional to 159,367.95, 219,965.12 and 91,383.69

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Solution

The fourth proportional to 159,367.95, 219,965.12 and 91,383.69 is: 126,130.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,367.95 : 219,965.12 = 91,383.69 : x
  2. Step 2: Convert to fraction form
    159,367.95/219,965.12 = 91,383.69/x
  3. Step 3: Cross multiply
    159,367.95x = 219,965.12 × 91,383.69
  4. Step 4: Simplify right side
    159,367.95x = 20,101,223,879.97
  5. Step 5: Solve for x
    x = 20,101,223,879.97/159,367.95
  6. Step 6: Final answer
    x = 126,130.91

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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.