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Finding the Fourth Proportional to 281,357.28, 422,077.64 and 81,679.32

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Solution

The fourth proportional to 281,357.28, 422,077.64 and 81,679.32 is: 122,531.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,357.28 : 422,077.64 = 81,679.32 : x
  2. Step 2: Convert to fraction form
    281,357.28/422,077.64 = 81,679.32/x
  3. Step 3: Cross multiply
    281,357.28x = 422,077.64 × 81,679.32
  4. Step 4: Simplify right side
    281,357.28x = 34,475,014,214.01
  5. Step 5: Solve for x
    x = 34,475,014,214.01/281,357.28
  6. Step 6: Final answer
    x = 122,531.09

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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.