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Finding the Fourth Proportional to 280,682.68, 421,090.22 and 91,142.44

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Solution

The fourth proportional to 280,682.68, 421,090.22 and 91,142.44 is: 136,735.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,682.68 : 421,090.22 = 91,142.44 : x
  2. Step 2: Convert to fraction form
    280,682.68/421,090.22 = 91,142.44/x
  3. Step 3: Cross multiply
    280,682.68x = 421,090.22 × 91,142.44
  4. Step 4: Simplify right side
    280,682.68x = 38,379,190,110.94
  5. Step 5: Solve for x
    x = 38,379,190,110.94/280,682.68
  6. Step 6: Final answer
    x = 136,735.16

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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.