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Finding the Fourth Proportional to 120,359.32, 166,101.60 and 72,611.68

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Solution

The fourth proportional to 120,359.32, 166,101.60 and 72,611.68 is: 100,207.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,359.32 : 166,101.60 = 72,611.68 : x
  2. Step 2: Convert to fraction form
    120,359.32/166,101.60 = 72,611.68/x
  3. Step 3: Cross multiply
    120,359.32x = 166,101.60 × 72,611.68
  4. Step 4: Simplify right side
    120,359.32x = 12,060,916,226.69
  5. Step 5: Solve for x
    x = 12,060,916,226.69/120,359.32
  6. Step 6: Final answer
    x = 100,207.58

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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.