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Finding the Fourth Proportional to 221,628.81, 332,443.25 and 55,416.81

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Solution

The fourth proportional to 221,628.81, 332,443.25 and 55,416.81 is: 83,125.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,628.81 : 332,443.25 = 55,416.81 : x
  2. Step 2: Convert to fraction form
    221,628.81/332,443.25 = 55,416.81/x
  3. Step 3: Cross multiply
    221,628.81x = 332,443.25 × 55,416.81
  4. Step 4: Simplify right side
    221,628.81x = 18,422,944,421.03
  5. Step 5: Solve for x
    x = 18,422,944,421.03/221,628.81
  6. Step 6: Final answer
    x = 83,125.22

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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.