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Finding the Fourth Proportional to 223,668.44, 308,670.93 and 128,193.56

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Solution

The fourth proportional to 223,668.44, 308,670.93 and 128,193.56 is: 176,911.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,668.44 : 308,670.93 = 128,193.56 : x
  2. Step 2: Convert to fraction form
    223,668.44/308,670.93 = 128,193.56/x
  3. Step 3: Cross multiply
    223,668.44x = 308,670.93 × 128,193.56
  4. Step 4: Simplify right side
    223,668.44x = 39,569,623,841.86
  5. Step 5: Solve for x
    x = 39,569,623,841.86/223,668.44
  6. Step 6: Final answer
    x = 176,911.97

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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.