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Finding the Fourth Proportional to 120,063.69, 165,687.96 and 66,348.69

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Solution

The fourth proportional to 120,063.69, 165,687.96 and 66,348.69 is: 91,561.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,063.69 : 165,687.96 = 66,348.69 : x
  2. Step 2: Convert to fraction form
    120,063.69/165,687.96 = 66,348.69/x
  3. Step 3: Cross multiply
    120,063.69x = 165,687.96 × 66,348.69
  4. Step 4: Simplify right side
    120,063.69x = 10,993,179,094.77
  5. Step 5: Solve for x
    x = 10,993,179,094.77/120,063.69
  6. Step 6: Final answer
    x = 91,561.23

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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.