Home / 149,438.20-206,221.90-81,455.80

Finding the Fourth Proportional to 149,438.20, 206,221.90 and 81,455.80

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Solution

The fourth proportional to 149,438.20, 206,221.90 and 81,455.80 is: 112,407.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,438.20 : 206,221.90 = 81,455.80 : x
  2. Step 2: Convert to fraction form
    149,438.20/206,221.90 = 81,455.80/x
  3. Step 3: Cross multiply
    149,438.20x = 206,221.90 × 81,455.80
  4. Step 4: Simplify right side
    149,438.20x = 16,797,969,842.02
  5. Step 5: Solve for x
    x = 16,797,969,842.02/149,438.20
  6. Step 6: Final answer
    x = 112,407.47

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1.5x scale

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.