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Finding the Fourth Proportional to 221,808.37, 306,101.68 and 135,765.64

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Solution

The fourth proportional to 221,808.37, 306,101.68 and 135,765.64 is: 187,360.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,808.37 : 306,101.68 = 135,765.64 : x
  2. Step 2: Convert to fraction form
    221,808.37/306,101.68 = 135,765.64/x
  3. Step 3: Cross multiply
    221,808.37x = 306,101.68 × 135,765.64
  4. Step 4: Simplify right side
    221,808.37x = 41,558,089,575.35
  5. Step 5: Solve for x
    x = 41,558,089,575.35/221,808.37
  6. Step 6: Final answer
    x = 187,360.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.