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Finding the Fourth Proportional to 219,898.20, 329,847.30 and 86,734.20

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Solution

The fourth proportional to 219,898.20, 329,847.30 and 86,734.20 is: 130,101.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,898.20 : 329,847.30 = 86,734.20 : x
  2. Step 2: Convert to fraction form
    219,898.20/329,847.30 = 86,734.20/x
  3. Step 3: Cross multiply
    219,898.20x = 329,847.30 × 86,734.20
  4. Step 4: Simplify right side
    219,898.20x = 28,609,041,687.66
  5. Step 5: Solve for x
    x = 28,609,041,687.66/219,898.20
  6. Step 6: Final answer
    x = 130,101.30

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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.