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Finding the Fourth Proportional to 119,639.52, 165,109.79 and 65,924.47

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Solution

The fourth proportional to 119,639.52, 165,109.79 and 65,924.47 is: 90,979.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,639.52 : 165,109.79 = 65,924.47 : x
  2. Step 2: Convert to fraction form
    119,639.52/165,109.79 = 65,924.47/x
  3. Step 3: Cross multiply
    119,639.52x = 165,109.79 × 65,924.47
  4. Step 4: Simplify right side
    119,639.52x = 10,884,775,810.34
  5. Step 5: Solve for x
    x = 10,884,775,810.34/119,639.52
  6. Step 6: Final answer
    x = 90,979.77

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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.