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Finding the Fourth Proportional to 91,245.36, 136,871.92 and 28,914.48

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Solution

The fourth proportional to 91,245.36, 136,871.92 and 28,914.48 is: 43,372.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,245.36 : 136,871.92 = 28,914.48 : x
  2. Step 2: Convert to fraction form
    91,245.36/136,871.92 = 28,914.48/x
  3. Step 3: Cross multiply
    91,245.36x = 136,871.92 × 28,914.48
  4. Step 4: Simplify right side
    91,245.36x = 3,957,580,393.40
  5. Step 5: Solve for x
    x = 3,957,580,393.40/91,245.36
  6. Step 6: Final answer
    x = 43,372.95

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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.