Home / 120,742.08-166,783.68-100,664.64

Finding the Fourth Proportional to 120,742.08, 166,783.68 and 100,664.64

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Solution

The fourth proportional to 120,742.08, 166,783.68 and 100,664.64 is: 139,050.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,742.08 : 166,783.68 = 100,664.64 : x
  2. Step 2: Convert to fraction form
    120,742.08/166,783.68 = 100,664.64/x
  3. Step 3: Cross multiply
    120,742.08x = 166,783.68 × 100,664.64
  4. Step 4: Simplify right side
    120,742.08x = 16,789,219,105.08
  5. Step 5: Solve for x
    x = 16,789,219,105.08/120,742.08
  6. Step 6: Final answer
    x = 139,050.27

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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.