Home / 120,111.21-165,753.53-66,396.20

Finding the Fourth Proportional to 120,111.21, 165,753.53 and 66,396.20

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Solution

The fourth proportional to 120,111.21, 165,753.53 and 66,396.20 is: 91,626.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,111.21 : 165,753.53 = 66,396.20 : x
  2. Step 2: Convert to fraction form
    120,111.21/165,753.53 = 66,396.20/x
  3. Step 3: Cross multiply
    120,111.21x = 165,753.53 × 66,396.20
  4. Step 4: Simplify right side
    120,111.21x = 11,005,403,367.84
  5. Step 5: Solve for x
    x = 11,005,403,367.84/120,111.21
  6. Step 6: Final answer
    x = 91,626.78

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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.