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Finding the Fourth Proportional to 251,021.70, 346,405.68 and 137,843.64

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Solution

The fourth proportional to 251,021.70, 346,405.68 and 137,843.64 is: 190,221.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,021.70 : 346,405.68 = 137,843.64 : x
  2. Step 2: Convert to fraction form
    251,021.70/346,405.68 = 137,843.64/x
  3. Step 3: Cross multiply
    251,021.70x = 346,405.68 × 137,843.64
  4. Step 4: Simplify right side
    251,021.70x = 47,749,819,847.88
  5. Step 5: Solve for x
    x = 47,749,819,847.88/251,021.70
  6. Step 6: Final answer
    x = 190,221.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.