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Finding the Fourth Proportional to 253,695.08, 380,512.38 and 66,721.16

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Solution

The fourth proportional to 253,695.08, 380,512.38 and 66,721.16 is: 100,073.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,695.08 : 380,512.38 = 66,721.16 : x
  2. Step 2: Convert to fraction form
    253,695.08/380,512.38 = 66,721.16/x
  3. Step 3: Cross multiply
    253,695.08x = 380,512.38 × 66,721.16
  4. Step 4: Simplify right side
    253,695.08x = 25,388,227,387.96
  5. Step 5: Solve for x
    x = 25,388,227,387.96/253,695.08
  6. Step 6: Final answer
    x = 100,073.79

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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.