Home / 50,720.20-76,080.30-21,128.20

Finding the Fourth Proportional to 50,720.20, 76,080.30 and 21,128.20

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Solution

The fourth proportional to 50,720.20, 76,080.30 and 21,128.20 is: 31,692.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,720.20 : 76,080.30 = 21,128.20 : x
  2. Step 2: Convert to fraction form
    50,720.20/76,080.30 = 21,128.20/x
  3. Step 3: Cross multiply
    50,720.20x = 76,080.30 × 21,128.20
  4. Step 4: Simplify right side
    50,720.20x = 1,607,439,794.46
  5. Step 5: Solve for x
    x = 1,607,439,794.46/50,720.20
  6. Step 6: Final answer
    x = 31,692.30

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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.