Home / 257,416.06-386,118.50-70,427.56

Finding the Fourth Proportional to 257,416.06, 386,118.50 and 70,427.56

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Solution

The fourth proportional to 257,416.06, 386,118.50 and 70,427.56 is: 105,639.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,416.06 : 386,118.50 = 70,427.56 : x
  2. Step 2: Convert to fraction form
    257,416.06/386,118.50 = 70,427.56/x
  3. Step 3: Cross multiply
    257,416.06x = 386,118.50 × 70,427.56
  4. Step 4: Simplify right side
    257,416.06x = 27,193,383,825.86
  5. Step 5: Solve for x
    x = 27,193,383,825.86/257,416.06
  6. Step 6: Final answer
    x = 105,639.81

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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.