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Finding the Fourth Proportional to 120,805.86, 166,717.62 and 67,091.12

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Solution

The fourth proportional to 120,805.86, 166,717.62 and 67,091.12 is: 92,588.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,805.86 : 166,717.62 = 67,091.12 : x
  2. Step 2: Convert to fraction form
    120,805.86/166,717.62 = 67,091.12/x
  3. Step 3: Cross multiply
    120,805.86x = 166,717.62 × 67,091.12
  4. Step 4: Simplify right side
    120,805.86x = 11,185,271,849.53
  5. Step 5: Solve for x
    x = 11,185,271,849.53/120,805.86
  6. Step 6: Final answer
    x = 92,588.82

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1.5x scale

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.