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Finding the Fourth Proportional to 45,294.34, 67,919.56 and 18,992.02

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Solution

The fourth proportional to 45,294.34, 67,919.56 and 18,992.02 is: 28,478.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,294.34 : 67,919.56 = 18,992.02 : x
  2. Step 2: Convert to fraction form
    45,294.34/67,919.56 = 18,992.02/x
  3. Step 3: Cross multiply
    45,294.34x = 67,919.56 × 18,992.02
  4. Step 4: Simplify right side
    45,294.34x = 1,289,929,641.91
  5. Step 5: Solve for x
    x = 1,289,929,641.91/45,294.34
  6. Step 6: Final answer
    x = 28,478.83

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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.