Home / 281,288.55-421,857.87-78,873.50

Finding the Fourth Proportional to 281,288.55, 421,857.87 and 78,873.50

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Solution

The fourth proportional to 281,288.55, 421,857.87 and 78,873.50 is: 118,289.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,288.55 : 421,857.87 = 78,873.50 : x
  2. Step 2: Convert to fraction form
    281,288.55/421,857.87 = 78,873.50/x
  3. Step 3: Cross multiply
    281,288.55x = 421,857.87 × 78,873.50
  4. Step 4: Simplify right side
    281,288.55x = 33,273,405,539.03
  5. Step 5: Solve for x
    x = 33,273,405,539.03/281,288.55
  6. Step 6: Final answer
    x = 118,289.23

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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.