Home / 128,278.43-192,336.14-112,515.11

Finding the Fourth Proportional to 128,278.43, 192,336.14 and 112,515.11

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Solution

The fourth proportional to 128,278.43, 192,336.14 and 112,515.11 is: 168,701.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,278.43 : 192,336.14 = 112,515.11 : x
  2. Step 2: Convert to fraction form
    128,278.43/192,336.14 = 112,515.11/x
  3. Step 3: Cross multiply
    128,278.43x = 192,336.14 × 112,515.11
  4. Step 4: Simplify right side
    128,278.43x = 21,640,721,146.08
  5. Step 5: Solve for x
    x = 21,640,721,146.08/128,278.43
  6. Step 6: Final answer
    x = 168,701.18

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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.