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Finding the Fourth Proportional to 85,393.44, 127,820.43 and 72,825.48

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Solution

The fourth proportional to 85,393.44, 127,820.43 and 72,825.48 is: 109,008.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,393.44 : 127,820.43 = 72,825.48 : x
  2. Step 2: Convert to fraction form
    85,393.44/127,820.43 = 72,825.48/x
  3. Step 3: Cross multiply
    85,393.44x = 127,820.43 × 72,825.48
  4. Step 4: Simplify right side
    85,393.44x = 9,308,584,168.56
  5. Step 5: Solve for x
    x = 9,308,584,168.56/85,393.44
  6. Step 6: Final answer
    x = 109,008.19

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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.