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Finding the Fourth Proportional to 120,838.93, 166,757.64 and 67,128.94

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Solution

The fourth proportional to 120,838.93, 166,757.64 and 67,128.94 is: 92,637.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,838.93 : 166,757.64 = 67,128.94 : x
  2. Step 2: Convert to fraction form
    120,838.93/166,757.64 = 67,128.94/x
  3. Step 3: Cross multiply
    120,838.93x = 166,757.64 × 67,128.94
  4. Step 4: Simplify right side
    120,838.93x = 11,194,263,566.82
  5. Step 5: Solve for x
    x = 11,194,263,566.82/120,838.93
  6. Step 6: Final answer
    x = 92,637.89

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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.