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Finding the Fourth Proportional to 219,819.30, 329,765.40 and 86,703.90

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Solution

The fourth proportional to 219,819.30, 329,765.40 and 86,703.90 is: 130,070.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,819.30 : 329,765.40 = 86,703.90 : x
  2. Step 2: Convert to fraction form
    219,819.30/329,765.40 = 86,703.90/x
  3. Step 3: Cross multiply
    219,819.30x = 329,765.40 × 86,703.90
  4. Step 4: Simplify right side
    219,819.30x = 28,591,946,265.06
  5. Step 5: Solve for x
    x = 28,591,946,265.06/219,819.30
  6. Step 6: Final answer
    x = 130,070.23

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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.