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Finding the Fourth Proportional to 223,913.43, 308,995.90 and 121,940.67

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Solution

The fourth proportional to 223,913.43, 308,995.90 and 121,940.67 is: 168,275.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,913.43 : 308,995.90 = 121,940.67 : x
  2. Step 2: Convert to fraction form
    223,913.43/308,995.90 = 121,940.67/x
  3. Step 3: Cross multiply
    223,913.43x = 308,995.90 × 121,940.67
  4. Step 4: Simplify right side
    223,913.43x = 37,679,167,927.14
  5. Step 5: Solve for x
    x = 37,679,167,927.14/223,913.43
  6. Step 6: Final answer
    x = 168,275.61

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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.