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Finding the Fourth Proportional to 120,615.62, 166,469.48 and 66,917.93

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Solution

The fourth proportional to 120,615.62, 166,469.48 and 66,917.93 is: 92,357.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,615.62 : 166,469.48 = 66,917.93 : x
  2. Step 2: Convert to fraction form
    120,615.62/166,469.48 = 66,917.93/x
  3. Step 3: Cross multiply
    120,615.62x = 166,469.48 × 66,917.93
  4. Step 4: Simplify right side
    120,615.62x = 11,139,793,030.17
  5. Step 5: Solve for x
    x = 11,139,793,030.17/120,615.62
  6. Step 6: Final answer
    x = 92,357.80

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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.