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Finding the Fourth Proportional to 223,345.75, 308,217.15 and 122,743.75

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Solution

The fourth proportional to 223,345.75, 308,217.15 and 122,743.75 is: 169,386.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,345.75 : 308,217.15 = 122,743.75 : x
  2. Step 2: Convert to fraction form
    223,345.75/308,217.15 = 122,743.75/x
  3. Step 3: Cross multiply
    223,345.75x = 308,217.15 × 122,743.75
  4. Step 4: Simplify right side
    223,345.75x = 37,831,728,805.31
  5. Step 5: Solve for x
    x = 37,831,728,805.31/223,345.75
  6. Step 6: Final answer
    x = 169,386.38

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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.