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Finding the Fourth Proportional to 223,703.11, 308,723.60 and 128,215.94

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Solution

The fourth proportional to 223,703.11, 308,723.60 and 128,215.94 is: 176,945.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,703.11 : 308,723.60 = 128,215.94 : x
  2. Step 2: Convert to fraction form
    223,703.11/308,723.60 = 128,215.94/x
  3. Step 3: Cross multiply
    223,703.11x = 308,723.60 × 128,215.94
  4. Step 4: Simplify right side
    223,703.11x = 39,583,286,704.91
  5. Step 5: Solve for x
    x = 39,583,286,704.91/223,703.11
  6. Step 6: Final answer
    x = 176,945.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.