Home / 281,451.48-422,179.38-81,785.40

Finding the Fourth Proportional to 281,451.48, 422,179.38 and 81,785.40

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Solution

The fourth proportional to 281,451.48, 422,179.38 and 81,785.40 is: 122,678.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,451.48 : 422,179.38 = 81,785.40 : x
  2. Step 2: Convert to fraction form
    281,451.48/422,179.38 = 81,785.40/x
  3. Step 3: Cross multiply
    281,451.48x = 422,179.38 × 81,785.40
  4. Step 4: Simplify right side
    281,451.48x = 34,528,109,465.05
  5. Step 5: Solve for x
    x = 34,528,109,465.05/281,451.48
  6. Step 6: Final answer
    x = 122,678.73

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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.