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Finding the Fourth Proportional to 221,770, 332,707.65 and 72,010.72

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Solution

The fourth proportional to 221,770, 332,707.65 and 72,010.72 is: 108,033.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,770 : 332,707.65 = 72,010.72 : x
  2. Step 2: Convert to fraction form
    221,770/332,707.65 = 72,010.72/x
  3. Step 3: Cross multiply
    221,770x = 332,707.65 × 72,010.72
  4. Step 4: Simplify right side
    221,770x = 23,958,517,426.01
  5. Step 5: Solve for x
    x = 23,958,517,426.01/221,770
  6. Step 6: Final answer
    x = 108,033.18

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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.