Home / 128,126.18-192,619.38-103,340.18

Finding the Fourth Proportional to 128,126.18, 192,619.38 and 103,340.18

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Solution

The fourth proportional to 128,126.18, 192,619.38 and 103,340.18 is: 155,357.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,126.18 : 192,619.38 = 103,340.18 : x
  2. Step 2: Convert to fraction form
    128,126.18/192,619.38 = 103,340.18/x
  3. Step 3: Cross multiply
    128,126.18x = 192,619.38 × 103,340.18
  4. Step 4: Simplify right side
    128,126.18x = 19,905,321,400.69
  5. Step 5: Solve for x
    x = 19,905,321,400.69/128,126.18
  6. Step 6: Final answer
    x = 155,357.18

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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.