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Finding the Fourth Proportional to 143,830.94, 215,711.81 and 43,992.01

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Solution

The fourth proportional to 143,830.94, 215,711.81 and 43,992.01 is: 65,977.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,830.94 : 215,711.81 = 43,992.01 : x
  2. Step 2: Convert to fraction form
    143,830.94/215,711.81 = 43,992.01/x
  3. Step 3: Cross multiply
    143,830.94x = 215,711.81 × 43,992.01
  4. Step 4: Simplify right side
    143,830.94x = 9,489,595,778.01
  5. Step 5: Solve for x
    x = 9,489,595,778.01/143,830.94
  6. Step 6: Final answer
    x = 65,977.43

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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.