Home / 120,917.98-166,967.55-100,879.93

Finding the Fourth Proportional to 120,917.98, 166,967.55 and 100,879.93

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Solution

The fourth proportional to 120,917.98, 166,967.55 and 100,879.93 is: 139,298.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,917.98 : 166,967.55 = 100,879.93 : x
  2. Step 2: Convert to fraction form
    120,917.98/166,967.55 = 100,879.93/x
  3. Step 3: Cross multiply
    120,917.98x = 166,967.55 × 100,879.93
  4. Step 4: Simplify right side
    120,917.98x = 16,843,674,756.27
  5. Step 5: Solve for x
    x = 16,843,674,756.27/120,917.98
  6. Step 6: Final answer
    x = 139,298.35

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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.