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Finding the Fourth Proportional to 72,668.97, 109,004.32 and 19,360.68

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Solution

The fourth proportional to 72,668.97, 109,004.32 and 19,360.68 is: 29,041.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,668.97 : 109,004.32 = 19,360.68 : x
  2. Step 2: Convert to fraction form
    72,668.97/109,004.32 = 19,360.68/x
  3. Step 3: Cross multiply
    72,668.97x = 109,004.32 × 19,360.68
  4. Step 4: Simplify right side
    72,668.97x = 2,110,398,112.78
  5. Step 5: Solve for x
    x = 2,110,398,112.78/72,668.97
  6. Step 6: Final answer
    x = 29,041.25

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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.