Home / 82,210.12-123,315.24-19,880.68

Finding the Fourth Proportional to 82,210.12, 123,315.24 and 19,880.68

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Solution

The fourth proportional to 82,210.12, 123,315.24 and 19,880.68 is: 29,821.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,210.12 : 123,315.24 = 19,880.68 : x
  2. Step 2: Convert to fraction form
    82,210.12/123,315.24 = 19,880.68/x
  3. Step 3: Cross multiply
    82,210.12x = 123,315.24 × 19,880.68
  4. Step 4: Simplify right side
    82,210.12x = 2,451,590,825.56
  5. Step 5: Solve for x
    x = 2,451,590,825.56/82,210.12
  6. Step 6: Final answer
    x = 29,821.03

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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.