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Finding the Fourth Proportional to 221,702.40, 332,553.60 and 81,561.60

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Solution

The fourth proportional to 221,702.40, 332,553.60 and 81,561.60 is: 122,342.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,702.40 : 332,553.60 = 81,561.60 : x
  2. Step 2: Convert to fraction form
    221,702.40/332,553.60 = 81,561.60/x
  3. Step 3: Cross multiply
    221,702.40x = 332,553.60 × 81,561.60
  4. Step 4: Simplify right side
    221,702.40x = 27,123,603,701.76
  5. Step 5: Solve for x
    x = 27,123,603,701.76/221,702.40
  6. Step 6: Final answer
    x = 122,342.40

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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.