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Finding the Fourth Proportional to 72,954.72, 100,668.96 and 41,121.72

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Solution

The fourth proportional to 72,954.72, 100,668.96 and 41,121.72 is: 56,743.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,954.72 : 100,668.96 = 41,121.72 : x
  2. Step 2: Convert to fraction form
    72,954.72/100,668.96 = 41,121.72/x
  3. Step 3: Cross multiply
    72,954.72x = 100,668.96 × 41,121.72
  4. Step 4: Simplify right side
    72,954.72x = 4,139,680,785.81
  5. Step 5: Solve for x
    x = 4,139,680,785.81/72,954.72
  6. Step 6: Final answer
    x = 56,743.15

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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.