Home / 203,428.36-280,747.78-112,812.75

Finding the Fourth Proportional to 203,428.36, 280,747.78 and 112,812.75

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Solution

The fourth proportional to 203,428.36, 280,747.78 and 112,812.75 is: 155,690.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,428.36 : 280,747.78 = 112,812.75 : x
  2. Step 2: Convert to fraction form
    203,428.36/280,747.78 = 112,812.75/x
  3. Step 3: Cross multiply
    203,428.36x = 280,747.78 × 112,812.75
  4. Step 4: Simplify right side
    203,428.36x = 31,671,929,118.20
  5. Step 5: Solve for x
    x = 31,671,929,118.20/203,428.36
  6. Step 6: Final answer
    x = 155,690.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.