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Finding the Fourth Proportional to 281,613.72, 422,448.30 and 81,936.12

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Solution

The fourth proportional to 281,613.72, 422,448.30 and 81,936.12 is: 122,912.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,613.72 : 422,448.30 = 81,936.12 : x
  2. Step 2: Convert to fraction form
    281,613.72/422,448.30 = 81,936.12/x
  3. Step 3: Cross multiply
    281,613.72x = 422,448.30 × 81,936.12
  4. Step 4: Simplify right side
    281,613.72x = 34,613,774,602.60
  5. Step 5: Solve for x
    x = 34,613,774,602.60/281,613.72
  6. Step 6: Final answer
    x = 122,912.25

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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.