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Finding the Fourth Proportional to 281,330.87, 422,033.36 and 91,724.65

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Solution

The fourth proportional to 281,330.87, 422,033.36 and 91,724.65 is: 137,599.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,330.87 : 422,033.36 = 91,724.65 : x
  2. Step 2: Convert to fraction form
    281,330.87/422,033.36 = 91,724.65/x
  3. Step 3: Cross multiply
    281,330.87x = 422,033.36 × 91,724.65
  4. Step 4: Simplify right side
    281,330.87x = 38,710,863,518.72
  5. Step 5: Solve for x
    x = 38,710,863,518.72/281,330.87
  6. Step 6: Final answer
    x = 137,599.06

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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.