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Finding the Fourth Proportional to 100,791.26, 151,208.75 and 30,668.75

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Solution

The fourth proportional to 100,791.26, 151,208.75 and 30,668.75 is: 46,009.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,791.26 : 151,208.75 = 30,668.75 : x
  2. Step 2: Convert to fraction form
    100,791.26/151,208.75 = 30,668.75/x
  3. Step 3: Cross multiply
    100,791.26x = 151,208.75 × 30,668.75
  4. Step 4: Simplify right side
    100,791.26x = 4,637,382,442.18
  5. Step 5: Solve for x
    x = 4,637,382,442.18/100,791.26
  6. Step 6: Final answer
    x = 46,009.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.