Home / 120,431.21-180,639.79-36,189.59

Finding the Fourth Proportional to 120,431.21, 180,639.79 and 36,189.59

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Solution

The fourth proportional to 120,431.21, 180,639.79 and 36,189.59 is: 54,282.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,431.21 : 180,639.79 = 36,189.59 : x
  2. Step 2: Convert to fraction form
    120,431.21/180,639.79 = 36,189.59/x
  3. Step 3: Cross multiply
    120,431.21x = 180,639.79 × 36,189.59
  4. Step 4: Simplify right side
    120,431.21x = 6,537,278,944.11
  5. Step 5: Solve for x
    x = 6,537,278,944.11/120,431.21
  6. Step 6: Final answer
    x = 54,282.27

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1.5x scale

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.