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Finding the Fourth Proportional to 45,294.84, 67,920.32 and 18,992.52

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Solution

The fourth proportional to 45,294.84, 67,920.32 and 18,992.52 is: 28,479.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,294.84 : 67,920.32 = 18,992.52 : x
  2. Step 2: Convert to fraction form
    45,294.84/67,920.32 = 18,992.52/x
  3. Step 3: Cross multiply
    45,294.84x = 67,920.32 × 18,992.52
  4. Step 4: Simplify right side
    45,294.84x = 1,289,977,941.04
  5. Step 5: Solve for x
    x = 1,289,977,941.04/45,294.84
  6. Step 6: Final answer
    x = 28,479.58

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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.