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Finding the Fourth Proportional to 221,131, 331,696.50 and 73,387

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Solution

The fourth proportional to 221,131, 331,696.50 and 73,387 is: 110,080.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,131 : 331,696.50 = 73,387 : x
  2. Step 2: Convert to fraction form
    221,131/331,696.50 = 73,387/x
  3. Step 3: Cross multiply
    221,131x = 331,696.50 × 73,387
  4. Step 4: Simplify right side
    221,131x = 24,342,211,045.50
  5. Step 5: Solve for x
    x = 24,342,211,045.50/221,131
  6. Step 6: Final answer
    x = 110,080.50

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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.