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Finding the Fourth Proportional to 120,495.69, 166,290.17 and 69,489.45

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Solution

The fourth proportional to 120,495.69, 166,290.17 and 69,489.45 is: 95,898.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,495.69 : 166,290.17 = 69,489.45 : x
  2. Step 2: Convert to fraction form
    120,495.69/166,290.17 = 69,489.45/x
  3. Step 3: Cross multiply
    120,495.69x = 166,290.17 × 69,489.45
  4. Step 4: Simplify right side
    120,495.69x = 11,555,412,106.26
  5. Step 5: Solve for x
    x = 11,555,412,106.26/120,495.69
  6. Step 6: Final answer
    x = 95,898.97

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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.