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Finding the Fourth Proportional to 281,379.06, 421,941.02 and 121,379.51

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Solution

The fourth proportional to 281,379.06, 421,941.02 and 121,379.51 is: 182,014.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,379.06 : 421,941.02 = 121,379.51 : x
  2. Step 2: Convert to fraction form
    281,379.06/421,941.02 = 121,379.51/x
  3. Step 3: Cross multiply
    281,379.06x = 421,941.02 × 121,379.51
  4. Step 4: Simplify right side
    281,379.06x = 51,214,993,953.05
  5. Step 5: Solve for x
    x = 51,214,993,953.05/281,379.06
  6. Step 6: Final answer
    x = 182,014.23

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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.