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Finding the Fourth Proportional to 120,784.32, 166,676.78 and 67,072.74

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Solution

The fourth proportional to 120,784.32, 166,676.78 and 67,072.74 is: 92,557.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,784.32 : 166,676.78 = 67,072.74 : x
  2. Step 2: Convert to fraction form
    120,784.32/166,676.78 = 67,072.74/x
  3. Step 3: Cross multiply
    120,784.32x = 166,676.78 × 67,072.74
  4. Step 4: Simplify right side
    120,784.32x = 11,179,468,328.98
  5. Step 5: Solve for x
    x = 11,179,468,328.98/120,784.32
  6. Step 6: Final answer
    x = 92,557.28

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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.