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Finding the Fourth Proportional to 219,671.12, 329,388.60 and 69,870.80

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Solution

The fourth proportional to 219,671.12, 329,388.60 and 69,870.80 is: 104,768.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,671.12 : 329,388.60 = 69,870.80 : x
  2. Step 2: Convert to fraction form
    219,671.12/329,388.60 = 69,870.80/x
  3. Step 3: Cross multiply
    219,671.12x = 329,388.60 × 69,870.80
  4. Step 4: Simplify right side
    219,671.12x = 23,014,644,992.88
  5. Step 5: Solve for x
    x = 23,014,644,992.88/219,671.12
  6. Step 6: Final answer
    x = 104,768.64

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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.