Home / 230,532.20-318,161.78-128,574.28

Finding the Fourth Proportional to 230,532.20, 318,161.78 and 128,574.28

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Solution

The fourth proportional to 230,532.20, 318,161.78 and 128,574.28 is: 177,447.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,532.20 : 318,161.78 = 128,574.28 : x
  2. Step 2: Convert to fraction form
    230,532.20/318,161.78 = 128,574.28/x
  3. Step 3: Cross multiply
    230,532.20x = 318,161.78 × 128,574.28
  4. Step 4: Simplify right side
    230,532.20x = 40,907,421,787.02
  5. Step 5: Solve for x
    x = 40,907,421,787.02/230,532.20
  6. Step 6: Final answer
    x = 177,447.76

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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.