Home / 123,631.26-170,538.04-78,919.26

Finding the Fourth Proportional to 123,631.26, 170,538.04 and 78,919.26

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Solution

The fourth proportional to 123,631.26, 170,538.04 and 78,919.26 is: 108,861.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,631.26 : 170,538.04 = 78,919.26 : x
  2. Step 2: Convert to fraction form
    123,631.26/170,538.04 = 78,919.26/x
  3. Step 3: Cross multiply
    123,631.26x = 170,538.04 × 78,919.26
  4. Step 4: Simplify right side
    123,631.26x = 13,458,735,918.65
  5. Step 5: Solve for x
    x = 13,458,735,918.65/123,631.26
  6. Step 6: Final answer
    x = 108,861.92

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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.