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Finding the Fourth Proportional to 219,730.60, 329,552.70 and 71,986.60

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Solution

The fourth proportional to 219,730.60, 329,552.70 and 71,986.60 is: 107,965.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,730.60 : 329,552.70 = 71,986.60 : x
  2. Step 2: Convert to fraction form
    219,730.60/329,552.70 = 71,986.60/x
  3. Step 3: Cross multiply
    219,730.60x = 329,552.70 × 71,986.60
  4. Step 4: Simplify right side
    219,730.60x = 23,723,378,393.82
  5. Step 5: Solve for x
    x = 23,723,378,393.82/219,730.60
  6. Step 6: Final answer
    x = 107,965.75

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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.