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Finding the Fourth Proportional to 221,720.64, 332,692.16 and 103,401.28

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Solution

The fourth proportional to 221,720.64, 332,692.16 and 103,401.28 is: 155,153.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,720.64 : 332,692.16 = 103,401.28 : x
  2. Step 2: Convert to fraction form
    221,720.64/332,692.16 = 103,401.28/x
  3. Step 3: Cross multiply
    221,720.64x = 332,692.16 × 103,401.28
  4. Step 4: Simplify right side
    221,720.64x = 34,400,795,189.96
  5. Step 5: Solve for x
    x = 34,400,795,189.96/221,720.64
  6. Step 6: Final answer
    x = 155,153.78

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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.