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Finding the Fourth Proportional to 221,742.88, 332,647.26 and 81,490.60

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Solution

The fourth proportional to 221,742.88, 332,647.26 and 81,490.60 is: 122,248.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,742.88 : 332,647.26 = 81,490.60 : x
  2. Step 2: Convert to fraction form
    221,742.88/332,647.26 = 81,490.60/x
  3. Step 3: Cross multiply
    221,742.88x = 332,647.26 × 81,490.60
  4. Step 4: Simplify right side
    221,742.88x = 27,107,624,805.76
  5. Step 5: Solve for x
    x = 27,107,624,805.76/221,742.88
  6. Step 6: Final answer
    x = 122,248.01

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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.