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Finding the Fourth Proportional to 219,355.80, 329,082.30 and 172,116.60

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Solution

The fourth proportional to 219,355.80, 329,082.30 and 172,116.60 is: 258,213.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,355.80 : 329,082.30 = 172,116.60 : x
  2. Step 2: Convert to fraction form
    219,355.80/329,082.30 = 172,116.60/x
  3. Step 3: Cross multiply
    219,355.80x = 329,082.30 × 172,116.60
  4. Step 4: Simplify right side
    219,355.80x = 56,640,526,596.18
  5. Step 5: Solve for x
    x = 56,640,526,596.18/219,355.80
  6. Step 6: Final answer
    x = 258,213.03

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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.