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Finding the Fourth Proportional to 72,188.37, 108,014.36 and 45,409.30

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Solution

The fourth proportional to 72,188.37, 108,014.36 and 45,409.30 is: 67,945.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,188.37 : 108,014.36 = 45,409.30 : x
  2. Step 2: Convert to fraction form
    72,188.37/108,014.36 = 45,409.30/x
  3. Step 3: Cross multiply
    72,188.37x = 108,014.36 × 45,409.30
  4. Step 4: Simplify right side
    72,188.37x = 4,904,856,477.55
  5. Step 5: Solve for x
    x = 4,904,856,477.55/72,188.37
  6. Step 6: Final answer
    x = 67,945.24

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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.