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Finding the Fourth Proportional to 179,728.64, 269,627.52 and 68,912

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Solution

The fourth proportional to 179,728.64, 269,627.52 and 68,912 is: 103,381.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    179,728.64 : 269,627.52 = 68,912 : x
  2. Step 2: Convert to fraction form
    179,728.64/269,627.52 = 68,912/x
  3. Step 3: Cross multiply
    179,728.64x = 269,627.52 × 68,912
  4. Step 4: Simplify right side
    179,728.64x = 18,580,571,658.24
  5. Step 5: Solve for x
    x = 18,580,571,658.24/179,728.64
  6. Step 6: Final answer
    x = 103,381.25

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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.