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Finding the Fourth Proportional to 67,058.90, 100,602.92 and 20,315.42

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Solution

The fourth proportional to 67,058.90, 100,602.92 and 20,315.42 is: 30,477.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,058.90 : 100,602.92 = 20,315.42 : x
  2. Step 2: Convert to fraction form
    67,058.90/100,602.92 = 20,315.42/x
  3. Step 3: Cross multiply
    67,058.90x = 100,602.92 × 20,315.42
  4. Step 4: Simplify right side
    67,058.90x = 2,043,790,120.80
  5. Step 5: Solve for x
    x = 2,043,790,120.80/67,058.90
  6. Step 6: Final answer
    x = 30,477.54

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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.