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Finding the Fourth Proportional to 120,781.32, 166,672.65 and 67,069.74

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Solution

The fourth proportional to 120,781.32, 166,672.65 and 67,069.74 is: 92,553.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,781.32 : 166,672.65 = 67,069.74 : x
  2. Step 2: Convert to fraction form
    120,781.32/166,672.65 = 67,069.74/x
  3. Step 3: Cross multiply
    120,781.32x = 166,672.65 × 67,069.74
  4. Step 4: Simplify right side
    120,781.32x = 11,178,691,300.61
  5. Step 5: Solve for x
    x = 11,178,691,300.61/120,781.32
  6. Step 6: Final answer
    x = 92,553.15

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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.