Home / 252,021.20-378,031.80-145,587.20

Finding the Fourth Proportional to 252,021.20, 378,031.80 and 145,587.20

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Solution

The fourth proportional to 252,021.20, 378,031.80 and 145,587.20 is: 218,380.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,021.20 : 378,031.80 = 145,587.20 : x
  2. Step 2: Convert to fraction form
    252,021.20/378,031.80 = 145,587.20/x
  3. Step 3: Cross multiply
    252,021.20x = 378,031.80 × 145,587.20
  4. Step 4: Simplify right side
    252,021.20x = 55,036,591,272.96
  5. Step 5: Solve for x
    x = 55,036,591,272.96/252,021.20
  6. Step 6: Final answer
    x = 218,380.80

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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.