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Finding the Fourth Proportional to 221,808.10, 332,712.15 and 81,537.70

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Solution

The fourth proportional to 221,808.10, 332,712.15 and 81,537.70 is: 122,306.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,808.10 : 332,712.15 = 81,537.70 : x
  2. Step 2: Convert to fraction form
    221,808.10/332,712.15 = 81,537.70/x
  3. Step 3: Cross multiply
    221,808.10x = 332,712.15 × 81,537.70
  4. Step 4: Simplify right side
    221,808.10x = 27,128,583,473.06
  5. Step 5: Solve for x
    x = 27,128,583,473.06/221,808.10
  6. Step 6: Final answer
    x = 122,306.55

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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.