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Finding the Fourth Proportional to 281,099.20, 421,720.80 and 162,558.40

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Solution

The fourth proportional to 281,099.20, 421,720.80 and 162,558.40 is: 243,879.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,099.20 : 421,720.80 = 162,558.40 : x
  2. Step 2: Convert to fraction form
    281,099.20/421,720.80 = 162,558.40/x
  3. Step 3: Cross multiply
    281,099.20x = 421,720.80 × 162,558.40
  4. Step 4: Simplify right side
    281,099.20x = 68,554,258,494.72
  5. Step 5: Solve for x
    x = 68,554,258,494.72/281,099.20
  6. Step 6: Final answer
    x = 243,879.24

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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.