Home / 128,433.81-192,628.17-39,688.09

Finding the Fourth Proportional to 128,433.81, 192,628.17 and 39,688.09

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Solution

The fourth proportional to 128,433.81, 192,628.17 and 39,688.09 is: 59,525.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,433.81 : 192,628.17 = 39,688.09 : x
  2. Step 2: Convert to fraction form
    128,433.81/192,628.17 = 39,688.09/x
  3. Step 3: Cross multiply
    128,433.81x = 192,628.17 × 39,688.09
  4. Step 4: Simplify right side
    128,433.81x = 7,645,043,517.09
  5. Step 5: Solve for x
    x = 7,645,043,517.09/128,433.81
  6. Step 6: Final answer
    x = 59,525.16

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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.