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Finding the Fourth Proportional to 183,786.60, 275,679.90 and 72,978.60

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Solution

The fourth proportional to 183,786.60, 275,679.90 and 72,978.60 is: 109,467.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    183,786.60 : 275,679.90 = 72,978.60 : x
  2. Step 2: Convert to fraction form
    183,786.60/275,679.90 = 72,978.60/x
  3. Step 3: Cross multiply
    183,786.60x = 275,679.90 × 72,978.60
  4. Step 4: Simplify right side
    183,786.60x = 20,118,733,150.14
  5. Step 5: Solve for x
    x = 20,118,733,150.14/183,786.60
  6. Step 6: Final answer
    x = 109,467.90

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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.