Home / 120,865.20-166,790.16-66,417.20

Finding the Fourth Proportional to 120,865.20, 166,790.16 and 66,417.20

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Solution

The fourth proportional to 120,865.20, 166,790.16 and 66,417.20 is: 91,653.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,865.20 : 166,790.16 = 66,417.20 : x
  2. Step 2: Convert to fraction form
    120,865.20/166,790.16 = 66,417.20/x
  3. Step 3: Cross multiply
    120,865.20x = 166,790.16 × 66,417.20
  4. Step 4: Simplify right side
    120,865.20x = 11,077,735,414.75
  5. Step 5: Solve for x
    x = 11,077,735,414.75/120,865.20
  6. Step 6: Final answer
    x = 91,653.64

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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.