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Finding the Fourth Proportional to 120,790.40, 166,685.22 and 67,078.80

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Solution

The fourth proportional to 120,790.40, 166,685.22 and 67,078.80 is: 92,565.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,790.40 : 166,685.22 = 67,078.80 : x
  2. Step 2: Convert to fraction form
    120,790.40/166,685.22 = 67,078.80/x
  3. Step 3: Cross multiply
    120,790.40x = 166,685.22 × 67,078.80
  4. Step 4: Simplify right side
    120,790.40x = 11,181,044,535.34
  5. Step 5: Solve for x
    x = 11,181,044,535.34/120,790.40
  6. Step 6: Final answer
    x = 92,565.68

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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.