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Finding the Fourth Proportional to 119,940, 165,531.78 and 69,639

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Solution

The fourth proportional to 119,940, 165,531.78 and 69,639 is: 96,110.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,940 : 165,531.78 = 69,639 : x
  2. Step 2: Convert to fraction form
    119,940/165,531.78 = 69,639/x
  3. Step 3: Cross multiply
    119,940x = 165,531.78 × 69,639
  4. Step 4: Simplify right side
    119,940x = 11,527,467,627.42
  5. Step 5: Solve for x
    x = 11,527,467,627.42/119,940
  6. Step 6: Final answer
    x = 96,110.29

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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.