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Finding the Fourth Proportional to 120,656.36, 166,502.60 and 66,208.36

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Solution

The fourth proportional to 120,656.36, 166,502.60 and 66,208.36 is: 91,365.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,656.36 : 166,502.60 = 66,208.36 : x
  2. Step 2: Convert to fraction form
    120,656.36/166,502.60 = 66,208.36/x
  3. Step 3: Cross multiply
    120,656.36x = 166,502.60 × 66,208.36
  4. Step 4: Simplify right side
    120,656.36x = 11,023,862,918.18
  5. Step 5: Solve for x
    x = 11,023,862,918.18/120,656.36
  6. Step 6: Final answer
    x = 91,365.79

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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.