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Finding the Fourth Proportional to 120,641.92, 166,486.05 and 66,926.94

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Solution

The fourth proportional to 120,641.92, 166,486.05 and 66,926.94 is: 92,359.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,641.92 : 166,486.05 = 66,926.94 : x
  2. Step 2: Convert to fraction form
    120,641.92/166,486.05 = 66,926.94/x
  3. Step 3: Cross multiply
    120,641.92x = 166,486.05 × 66,926.94
  4. Step 4: Simplify right side
    120,641.92x = 11,142,401,840.17
  5. Step 5: Solve for x
    x = 11,142,401,840.17/120,641.92
  6. Step 6: Final answer
    x = 92,359.29

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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.