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Finding the Fourth Proportional to 120,357.51, 166,099.10 and 72,609.86

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Solution

The fourth proportional to 120,357.51, 166,099.10 and 72,609.86 is: 100,205.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,357.51 : 166,099.10 = 72,609.86 : x
  2. Step 2: Convert to fraction form
    120,357.51/166,099.10 = 72,609.86/x
  3. Step 3: Cross multiply
    120,357.51x = 166,099.10 × 72,609.86
  4. Step 4: Simplify right side
    120,357.51x = 12,060,431,203.58
  5. Step 5: Solve for x
    x = 12,060,431,203.58/120,357.51
  6. Step 6: Final answer
    x = 100,205.06

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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.