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Finding the Fourth Proportional to 72,948.36, 100,668.72 and 39,414.36

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Solution

The fourth proportional to 72,948.36, 100,668.72 and 39,414.36 is: 54,391.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,948.36 : 100,668.72 = 39,414.36 : x
  2. Step 2: Convert to fraction form
    72,948.36/100,668.72 = 39,414.36/x
  3. Step 3: Cross multiply
    72,948.36x = 100,668.72 × 39,414.36
  4. Step 4: Simplify right side
    72,948.36x = 3,967,793,170.82
  5. Step 5: Solve for x
    x = 3,967,793,170.82/72,948.36
  6. Step 6: Final answer
    x = 54,391.81

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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.