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Finding the Fourth Proportional to 80,898.84, 121,269.87 and 30,940.47

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Solution

The fourth proportional to 80,898.84, 121,269.87 and 30,940.47 is: 46,380.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,898.84 : 121,269.87 = 30,940.47 : x
  2. Step 2: Convert to fraction form
    80,898.84/121,269.87 = 30,940.47/x
  3. Step 3: Cross multiply
    80,898.84x = 121,269.87 × 30,940.47
  4. Step 4: Simplify right side
    80,898.84x = 3,752,146,774.64
  5. Step 5: Solve for x
    x = 3,752,146,774.64/80,898.84
  6. Step 6: Final answer
    x = 46,380.72

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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.