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Finding the Fourth Proportional to 219,641.90, 329,338.01 and 86,449.96

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Solution

The fourth proportional to 219,641.90, 329,338.01 and 86,449.96 is: 129,625.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,641.90 : 329,338.01 = 86,449.96 : x
  2. Step 2: Convert to fraction form
    219,641.90/329,338.01 = 86,449.96/x
  3. Step 3: Cross multiply
    219,641.90x = 329,338.01 × 86,449.96
  4. Step 4: Simplify right side
    219,641.90x = 28,471,257,183.76
  5. Step 5: Solve for x
    x = 28,471,257,183.76/219,641.90
  6. Step 6: Final answer
    x = 129,625.80

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1.5x scale

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.