Home / 128,212.40-192,354.15-53,367.80

Finding the Fourth Proportional to 128,212.40, 192,354.15 and 53,367.80

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Solution

The fourth proportional to 128,212.40, 192,354.15 and 53,367.80 is: 80,066.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,212.40 : 192,354.15 = 53,367.80 : x
  2. Step 2: Convert to fraction form
    128,212.40/192,354.15 = 53,367.80/x
  3. Step 3: Cross multiply
    128,212.40x = 192,354.15 × 53,367.80
  4. Step 4: Simplify right side
    128,212.40x = 10,265,517,806.37
  5. Step 5: Solve for x
    x = 10,265,517,806.37/128,212.40
  6. Step 6: Final answer
    x = 80,066.50

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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.