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Finding the Fourth Proportional to 120,954.54, 166,921.55 and 66,510.84

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Solution

The fourth proportional to 120,954.54, 166,921.55 and 66,510.84 is: 91,787.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,954.54 : 166,921.55 = 66,510.84 : x
  2. Step 2: Convert to fraction form
    120,954.54/166,921.55 = 66,510.84/x
  3. Step 3: Cross multiply
    120,954.54x = 166,921.55 × 66,510.84
  4. Step 4: Simplify right side
    120,954.54x = 11,102,092,108.49
  5. Step 5: Solve for x
    x = 11,102,092,108.49/120,954.54
  6. Step 6: Final answer
    x = 91,787.31

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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.