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Finding the Fourth Proportional to 221,348.67, 331,825.74 and 81,074.49

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Solution

The fourth proportional to 221,348.67, 331,825.74 and 81,074.49 is: 121,539.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,348.67 : 331,825.74 = 81,074.49 : x
  2. Step 2: Convert to fraction form
    221,348.67/331,825.74 = 81,074.49/x
  3. Step 3: Cross multiply
    221,348.67x = 331,825.74 × 81,074.49
  4. Step 4: Simplify right side
    221,348.67x = 26,902,602,639.37
  5. Step 5: Solve for x
    x = 26,902,602,639.37/221,348.67
  6. Step 6: Final answer
    x = 121,539.48

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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.