Home / 120,830.81-166,793.01-80,529.86

Finding the Fourth Proportional to 120,830.81, 166,793.01 and 80,529.86

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Solution

The fourth proportional to 120,830.81, 166,793.01 and 80,529.86 is: 111,162.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,830.81 : 166,793.01 = 80,529.86 : x
  2. Step 2: Convert to fraction form
    120,830.81/166,793.01 = 80,529.86/x
  3. Step 3: Cross multiply
    120,830.81x = 166,793.01 × 80,529.86
  4. Step 4: Simplify right side
    120,830.81x = 13,431,818,161.26
  5. Step 5: Solve for x
    x = 13,431,818,161.26/120,830.81
  6. Step 6: Final answer
    x = 111,162.20

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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.