Home / 252,213.20-378,467-139,987.60

Finding the Fourth Proportional to 252,213.20, 378,467 and 139,987.60

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Solution

The fourth proportional to 252,213.20, 378,467 and 139,987.60 is: 210,063.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,213.20 : 378,467 = 139,987.60 : x
  2. Step 2: Convert to fraction form
    252,213.20/378,467 = 139,987.60/x
  3. Step 3: Cross multiply
    252,213.20x = 378,467 × 139,987.60
  4. Step 4: Simplify right side
    252,213.20x = 52,980,687,009.20
  5. Step 5: Solve for x
    x = 52,980,687,009.20/252,213.20
  6. Step 6: Final answer
    x = 210,063.10

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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.