Home / 257,418.06-386,121.50-70,429.56

Finding the Fourth Proportional to 257,418.06, 386,121.50 and 70,429.56

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Solution

The fourth proportional to 257,418.06, 386,121.50 and 70,429.56 is: 105,642.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,418.06 : 386,121.50 = 70,429.56 : x
  2. Step 2: Convert to fraction form
    257,418.06/386,121.50 = 70,429.56/x
  3. Step 3: Cross multiply
    257,418.06x = 386,121.50 × 70,429.56
  4. Step 4: Simplify right side
    257,418.06x = 27,194,367,351.54
  5. Step 5: Solve for x
    x = 27,194,367,351.54/257,418.06
  6. Step 6: Final answer
    x = 105,642.81

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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.