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Finding the Fourth Proportional to 50,740, 70,021.20 and 28,388.32

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Solution

The fourth proportional to 50,740, 70,021.20 and 28,388.32 is: 39,175.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,740 : 70,021.20 = 28,388.32 : x
  2. Step 2: Convert to fraction form
    50,740/70,021.20 = 28,388.32/x
  3. Step 3: Cross multiply
    50,740x = 70,021.20 × 28,388.32
  4. Step 4: Simplify right side
    50,740x = 1,987,784,232.38
  5. Step 5: Solve for x
    x = 1,987,784,232.38/50,740
  6. Step 6: Final answer
    x = 39,175.88

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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.