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Finding the Fourth Proportional to 223,386.91, 308,276.31 and 121,412.38

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Solution

The fourth proportional to 223,386.91, 308,276.31 and 121,412.38 is: 167,550.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,386.91 : 308,276.31 = 121,412.38 : x
  2. Step 2: Convert to fraction form
    223,386.91/308,276.31 = 121,412.38/x
  3. Step 3: Cross multiply
    223,386.91x = 308,276.31 × 121,412.38
  4. Step 4: Simplify right side
    223,386.91x = 37,428,560,494.72
  5. Step 5: Solve for x
    x = 37,428,560,494.72/223,386.91
  6. Step 6: Final answer
    x = 167,550.37

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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.