Home / 120,276.78-165,979.58-66,558.66

Finding the Fourth Proportional to 120,276.78, 165,979.58 and 66,558.66

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Solution

The fourth proportional to 120,276.78, 165,979.58 and 66,558.66 is: 91,849.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,276.78 : 165,979.58 = 66,558.66 : x
  2. Step 2: Convert to fraction form
    120,276.78/165,979.58 = 66,558.66/x
  3. Step 3: Cross multiply
    120,276.78x = 165,979.58 × 66,558.66
  4. Step 4: Simplify right side
    120,276.78x = 11,047,378,099.37
  5. Step 5: Solve for x
    x = 11,047,378,099.37/120,276.78
  6. Step 6: Final answer
    x = 91,849.63

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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.