Home / 120,379.74-166,079.43-77,961.66

Finding the Fourth Proportional to 120,379.74, 166,079.43 and 77,961.66

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Solution

The fourth proportional to 120,379.74, 166,079.43 and 77,961.66 is: 107,558.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,379.74 : 166,079.43 = 77,961.66 : x
  2. Step 2: Convert to fraction form
    120,379.74/166,079.43 = 77,961.66/x
  3. Step 3: Cross multiply
    120,379.74x = 166,079.43 × 77,961.66
  4. Step 4: Simplify right side
    120,379.74x = 12,947,828,054.65
  5. Step 5: Solve for x
    x = 12,947,828,054.65/120,379.74
  6. Step 6: Final answer
    x = 107,558.20

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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.