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Finding the Fourth Proportional to 281,112.34, 421,724.85 and 103,620.10

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Solution

The fourth proportional to 281,112.34, 421,724.85 and 103,620.10 is: 155,450.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,112.34 : 421,724.85 = 103,620.10 : x
  2. Step 2: Convert to fraction form
    281,112.34/421,724.85 = 103,620.10/x
  3. Step 3: Cross multiply
    281,112.34x = 421,724.85 × 103,620.10
  4. Step 4: Simplify right side
    281,112.34x = 43,699,171,129.49
  5. Step 5: Solve for x
    x = 43,699,171,129.49/281,112.34
  6. Step 6: Final answer
    x = 155,450.92

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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.