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Finding the Fourth Proportional to 42,602.63, 63,912.15 and 19,229.09

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Solution

The fourth proportional to 42,602.63, 63,912.15 and 19,229.09 is: 28,847.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,602.63 : 63,912.15 = 19,229.09 : x
  2. Step 2: Convert to fraction form
    42,602.63/63,912.15 = 19,229.09/x
  3. Step 3: Cross multiply
    42,602.63x = 63,912.15 × 19,229.09
  4. Step 4: Simplify right side
    42,602.63x = 1,228,972,164.88
  5. Step 5: Solve for x
    x = 1,228,972,164.88/42,602.63
  6. Step 6: Final answer
    x = 28,847.33

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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.