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Finding the Fourth Proportional to 281,812.20, 422,679.90 and 84,820.20

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Solution

The fourth proportional to 281,812.20, 422,679.90 and 84,820.20 is: 127,218.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,812.20 : 422,679.90 = 84,820.20 : x
  2. Step 2: Convert to fraction form
    281,812.20/422,679.90 = 84,820.20/x
  3. Step 3: Cross multiply
    281,812.20x = 422,679.90 × 84,820.20
  4. Step 4: Simplify right side
    281,812.20x = 35,851,793,653.98
  5. Step 5: Solve for x
    x = 35,851,793,653.98/281,812.20
  6. Step 6: Final answer
    x = 127,218.74

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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.