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Finding the Fourth Proportional to 281,295.51, 421,377.89 and 131,328.87

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Solution

The fourth proportional to 281,295.51, 421,377.89 and 131,328.87 is: 196,729.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,295.51 : 421,377.89 = 131,328.87 : x
  2. Step 2: Convert to fraction form
    281,295.51/421,377.89 = 131,328.87/x
  3. Step 3: Cross multiply
    281,295.51x = 421,377.89 × 131,328.87
  4. Step 4: Simplify right side
    281,295.51x = 55,339,081,480.04
  5. Step 5: Solve for x
    x = 55,339,081,480.04/281,295.51
  6. Step 6: Final answer
    x = 196,729.35

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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.