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Finding the Fourth Proportional to 221,970.30, 332,958.54 and 72,211.38

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Solution

The fourth proportional to 221,970.30, 332,958.54 and 72,211.38 is: 108,318.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,970.30 : 332,958.54 = 72,211.38 : x
  2. Step 2: Convert to fraction form
    221,970.30/332,958.54 = 72,211.38/x
  3. Step 3: Cross multiply
    221,970.30x = 332,958.54 × 72,211.38
  4. Step 4: Simplify right side
    221,970.30x = 24,043,395,656.19
  5. Step 5: Solve for x
    x = 24,043,395,656.19/221,970.30
  6. Step 6: Final answer
    x = 108,318.08

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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.