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Finding the Fourth Proportional to 120,410.91, 166,167.04 and 66,699.40

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Solution

The fourth proportional to 120,410.91, 166,167.04 and 66,699.40 is: 92,045.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,410.91 : 166,167.04 = 66,699.40 : x
  2. Step 2: Convert to fraction form
    120,410.91/166,167.04 = 66,699.40/x
  3. Step 3: Cross multiply
    120,410.91x = 166,167.04 × 66,699.40
  4. Step 4: Simplify right side
    120,410.91x = 11,083,241,867.78
  5. Step 5: Solve for x
    x = 11,083,241,867.78/120,410.91
  6. Step 6: Final answer
    x = 92,045.16

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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.