Home / 120,972.40-166,796.76-100,858.48

Finding the Fourth Proportional to 120,972.40, 166,796.76 and 100,858.48

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Solution

The fourth proportional to 120,972.40, 166,796.76 and 100,858.48 is: 139,063.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,972.40 : 166,796.76 = 100,858.48 : x
  2. Step 2: Convert to fraction form
    120,972.40/166,796.76 = 100,858.48/x
  3. Step 3: Cross multiply
    120,972.40x = 166,796.76 × 100,858.48
  4. Step 4: Simplify right side
    120,972.40x = 16,822,867,682.52
  5. Step 5: Solve for x
    x = 16,822,867,682.52/120,972.40
  6. Step 6: Final answer
    x = 139,063.68

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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.