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Finding the Fourth Proportional to 199,388.70, 275,248.55 and 122,921.46

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Solution

The fourth proportional to 199,388.70, 275,248.55 and 122,921.46 is: 169,688.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,388.70 : 275,248.55 = 122,921.46 : x
  2. Step 2: Convert to fraction form
    199,388.70/275,248.55 = 122,921.46/x
  3. Step 3: Cross multiply
    199,388.70x = 275,248.55 × 122,921.46
  4. Step 4: Simplify right side
    199,388.70x = 33,833,953,014.28
  5. Step 5: Solve for x
    x = 33,833,953,014.28/199,388.70
  6. Step 6: Final answer
    x = 169,688.42

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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.