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Finding the Fourth Proportional to 253,695.33, 380,512.76 and 66,721.41

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Solution

The fourth proportional to 253,695.33, 380,512.76 and 66,721.41 is: 100,074.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,695.33 : 380,512.76 = 66,721.41 : x
  2. Step 2: Convert to fraction form
    253,695.33/380,512.76 = 66,721.41/x
  3. Step 3: Cross multiply
    253,695.33x = 380,512.76 × 66,721.41
  4. Step 4: Simplify right side
    253,695.33x = 25,388,347,536.58
  5. Step 5: Solve for x
    x = 25,388,347,536.58/253,695.33
  6. Step 6: Final answer
    x = 100,074.16

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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.