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Finding the Fourth Proportional to 120,321.56, 166,087.50 and 70,020.56

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Solution

The fourth proportional to 120,321.56, 166,087.50 and 70,020.56 is: 96,653.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,321.56 : 166,087.50 = 70,020.56 : x
  2. Step 2: Convert to fraction form
    120,321.56/166,087.50 = 70,020.56/x
  3. Step 3: Cross multiply
    120,321.56x = 166,087.50 × 70,020.56
  4. Step 4: Simplify right side
    120,321.56x = 11,629,539,911.64
  5. Step 5: Solve for x
    x = 11,629,539,911.64/120,321.56
  6. Step 6: Final answer
    x = 96,653.83

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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.