Home / 120,106.55-165,739.84-66,388.37

Finding the Fourth Proportional to 120,106.55, 165,739.84 and 66,388.37

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Solution

The fourth proportional to 120,106.55, 165,739.84 and 66,388.37 is: 91,611.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,106.55 : 165,739.84 = 66,388.37 : x
  2. Step 2: Convert to fraction form
    120,106.55/165,739.84 = 66,388.37/x
  3. Step 3: Cross multiply
    120,106.55x = 165,739.84 × 66,388.37
  4. Step 4: Simplify right side
    120,106.55x = 11,003,196,826.99
  5. Step 5: Solve for x
    x = 11,003,196,826.99/120,106.55
  6. Step 6: Final answer
    x = 91,611.96

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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.