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Finding the Fourth Proportional to 82,523.80, 123,785.70 and 20,194.30

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Solution

The fourth proportional to 82,523.80, 123,785.70 and 20,194.30 is: 30,291.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,523.80 : 123,785.70 = 20,194.30 : x
  2. Step 2: Convert to fraction form
    82,523.80/123,785.70 = 20,194.30/x
  3. Step 3: Cross multiply
    82,523.80x = 123,785.70 × 20,194.30
  4. Step 4: Simplify right side
    82,523.80x = 2,499,765,561.51
  5. Step 5: Solve for x
    x = 2,499,765,561.51/82,523.80
  6. Step 6: Final answer
    x = 30,291.45

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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.