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Finding the Fourth Proportional to 119,939, 165,530.40 and 69,638

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Solution

The fourth proportional to 119,939, 165,530.40 and 69,638 is: 96,108.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,939 : 165,530.40 = 69,638 : x
  2. Step 2: Convert to fraction form
    119,939/165,530.40 = 69,638/x
  3. Step 3: Cross multiply
    119,939x = 165,530.40 × 69,638
  4. Step 4: Simplify right side
    119,939x = 11,527,205,995.20
  5. Step 5: Solve for x
    x = 11,527,205,995.20/119,939
  6. Step 6: Final answer
    x = 96,108.91

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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.