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Finding the Fourth Proportional to 281,690.60, 422,551.28 and 71,330.36

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Solution

The fourth proportional to 281,690.60, 422,551.28 and 71,330.36 is: 106,999.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,690.60 : 422,551.28 = 71,330.36 : x
  2. Step 2: Convert to fraction form
    281,690.60/422,551.28 = 71,330.36/x
  3. Step 3: Cross multiply
    281,690.60x = 422,551.28 × 71,330.36
  4. Step 4: Simplify right side
    281,690.60x = 30,140,732,986.43
  5. Step 5: Solve for x
    x = 30,140,732,986.43/281,690.60
  6. Step 6: Final answer
    x = 106,999.43

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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.