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Finding the Fourth Proportional to 91,247.44, 136,874.04 and 28,918.48

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Solution

The fourth proportional to 91,247.44, 136,874.04 and 28,918.48 is: 43,378.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,247.44 : 136,874.04 = 28,918.48 : x
  2. Step 2: Convert to fraction form
    91,247.44/136,874.04 = 28,918.48/x
  3. Step 3: Cross multiply
    91,247.44x = 136,874.04 × 28,918.48
  4. Step 4: Simplify right side
    91,247.44x = 3,958,189,188.26
  5. Step 5: Solve for x
    x = 3,958,189,188.26/91,247.44
  6. Step 6: Final answer
    x = 43,378.63

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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.