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Finding the Fourth Proportional to 119,663.92, 165,128.79 and 65,945.94

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Solution

The fourth proportional to 119,663.92, 165,128.79 and 65,945.94 is: 91,001.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,663.92 : 165,128.79 = 65,945.94 : x
  2. Step 2: Convert to fraction form
    119,663.92/165,128.79 = 65,945.94/x
  3. Step 3: Cross multiply
    119,663.92x = 165,128.79 × 65,945.94
  4. Step 4: Simplify right side
    119,663.92x = 10,889,572,451.97
  5. Step 5: Solve for x
    x = 10,889,572,451.97/119,663.92
  6. Step 6: Final answer
    x = 91,001.30

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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.