Home / 82,208.12-123,312.24-19,878.68

Finding the Fourth Proportional to 82,208.12, 123,312.24 and 19,878.68

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Solution

The fourth proportional to 82,208.12, 123,312.24 and 19,878.68 is: 29,818.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,208.12 : 123,312.24 = 19,878.68 : x
  2. Step 2: Convert to fraction form
    82,208.12/123,312.24 = 19,878.68/x
  3. Step 3: Cross multiply
    82,208.12x = 123,312.24 × 19,878.68
  4. Step 4: Simplify right side
    82,208.12x = 2,451,284,559.04
  5. Step 5: Solve for x
    x = 2,451,284,559.04/82,208.12
  6. Step 6: Final answer
    x = 29,818.03

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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.