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Finding the Fourth Proportional to 120,890.55, 166,781.21 and 69,893.94

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Solution

The fourth proportional to 120,890.55, 166,781.21 and 69,893.94 is: 96,426.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,890.55 : 166,781.21 = 69,893.94 : x
  2. Step 2: Convert to fraction form
    120,890.55/166,781.21 = 69,893.94/x
  3. Step 3: Cross multiply
    120,890.55x = 166,781.21 × 69,893.94
  4. Step 4: Simplify right side
    120,890.55x = 11,656,995,535.40
  5. Step 5: Solve for x
    x = 11,656,995,535.40/120,890.55
  6. Step 6: Final answer
    x = 96,426.03

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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.