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Finding the Fourth Proportional to 213,752.80, 320,629.20 and 55,997.20

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Solution

The fourth proportional to 213,752.80, 320,629.20 and 55,997.20 is: 83,995.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,752.80 : 320,629.20 = 55,997.20 : x
  2. Step 2: Convert to fraction form
    213,752.80/320,629.20 = 55,997.20/x
  3. Step 3: Cross multiply
    213,752.80x = 320,629.20 × 55,997.20
  4. Step 4: Simplify right side
    213,752.80x = 17,954,337,438.24
  5. Step 5: Solve for x
    x = 17,954,337,438.24/213,752.80
  6. Step 6: Final answer
    x = 83,995.80

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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.