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Finding the Fourth Proportional to 120,653.56, 166,521.90 and 66,955.82

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Solution

The fourth proportional to 120,653.56, 166,521.90 and 66,955.82 is: 92,410.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,653.56 : 166,521.90 = 66,955.82 : x
  2. Step 2: Convert to fraction form
    120,653.56/166,521.90 = 66,955.82/x
  3. Step 3: Cross multiply
    120,653.56x = 166,521.90 × 66,955.82
  4. Step 4: Simplify right side
    120,653.56x = 11,149,610,362.46
  5. Step 5: Solve for x
    x = 11,149,610,362.46/120,653.56
  6. Step 6: Final answer
    x = 92,410.12

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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.