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Finding the Fourth Proportional to 120,347.94, 166,081.50 and 66,637.92

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Solution

The fourth proportional to 120,347.94, 166,081.50 and 66,637.92 is: 91,961.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,347.94 : 166,081.50 = 66,637.92 : x
  2. Step 2: Convert to fraction form
    120,347.94/166,081.50 = 66,637.92/x
  3. Step 3: Cross multiply
    120,347.94x = 166,081.50 × 66,637.92
  4. Step 4: Simplify right side
    120,347.94x = 11,067,325,710.48
  5. Step 5: Solve for x
    x = 11,067,325,710.48/120,347.94
  6. Step 6: Final answer
    x = 91,961.07

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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.