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Finding the Fourth Proportional to 120,363.15, 166,099.12 and 66,647.01

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Solution

The fourth proportional to 120,363.15, 166,099.12 and 66,647.01 is: 91,971.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,363.15 : 166,099.12 = 66,647.01 : x
  2. Step 2: Convert to fraction form
    120,363.15/166,099.12 = 66,647.01/x
  3. Step 3: Cross multiply
    120,363.15x = 166,099.12 × 66,647.01
  4. Step 4: Simplify right side
    120,363.15x = 11,070,010,167.89
  5. Step 5: Solve for x
    x = 11,070,010,167.89/120,363.15
  6. Step 6: Final answer
    x = 91,971.75

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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.