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Finding the Fourth Proportional to 281,189.48, 421,784.20 and 70,843.80

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Solution

The fourth proportional to 281,189.48, 421,784.20 and 70,843.80 is: 106,265.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,189.48 : 421,784.20 = 70,843.80 : x
  2. Step 2: Convert to fraction form
    281,189.48/421,784.20 = 70,843.80/x
  3. Step 3: Cross multiply
    281,189.48x = 421,784.20 × 70,843.80
  4. Step 4: Simplify right side
    281,189.48x = 29,880,795,507.96
  5. Step 5: Solve for x
    x = 29,880,795,507.96/281,189.48
  6. Step 6: Final answer
    x = 106,265.69

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1.5x scale

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.