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Finding the Fourth Proportional to 143,993.80, 215,888.22 and 55,172.20

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Solution

The fourth proportional to 143,993.80, 215,888.22 and 55,172.20 is: 82,719.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,993.80 : 215,888.22 = 55,172.20 : x
  2. Step 2: Convert to fraction form
    143,993.80/215,888.22 = 55,172.20/x
  3. Step 3: Cross multiply
    143,993.80x = 215,888.22 × 55,172.20
  4. Step 4: Simplify right side
    143,993.80x = 11,911,028,051.48
  5. Step 5: Solve for x
    x = 11,911,028,051.48/143,993.80
  6. Step 6: Final answer
    x = 82,719.03

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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.