Home / 128,139.60-192,209.40-126,171.30

Finding the Fourth Proportional to 128,139.60, 192,209.40 and 126,171.30

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Solution

The fourth proportional to 128,139.60, 192,209.40 and 126,171.30 is: 189,256.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,139.60 : 192,209.40 = 126,171.30 : x
  2. Step 2: Convert to fraction form
    128,139.60/192,209.40 = 126,171.30/x
  3. Step 3: Cross multiply
    128,139.60x = 192,209.40 × 126,171.30
  4. Step 4: Simplify right side
    128,139.60x = 24,251,309,870.22
  5. Step 5: Solve for x
    x = 24,251,309,870.22/128,139.60
  6. Step 6: Final answer
    x = 189,256.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.