Home / 75,620.32-113,421.84-20,220.64

Finding the Fourth Proportional to 75,620.32, 113,421.84 and 20,220.64

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Solution

The fourth proportional to 75,620.32, 113,421.84 and 20,220.64 is: 30,328.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,620.32 : 113,421.84 = 20,220.64 : x
  2. Step 2: Convert to fraction form
    75,620.32/113,421.84 = 20,220.64/x
  3. Step 3: Cross multiply
    75,620.32x = 113,421.84 × 20,220.64
  4. Step 4: Simplify right side
    75,620.32x = 2,293,462,194.78
  5. Step 5: Solve for x
    x = 2,293,462,194.78/75,620.32
  6. Step 6: Final answer
    x = 30,328.65

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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.