Home / 171,515.60-257,419.20-76,891.40

Finding the Fourth Proportional to 171,515.60, 257,419.20 and 76,891.40

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Solution

The fourth proportional to 171,515.60, 257,419.20 and 76,891.40 is: 115,402.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,515.60 : 257,419.20 = 76,891.40 : x
  2. Step 2: Convert to fraction form
    171,515.60/257,419.20 = 76,891.40/x
  3. Step 3: Cross multiply
    171,515.60x = 257,419.20 × 76,891.40
  4. Step 4: Simplify right side
    171,515.60x = 19,793,322,674.88
  5. Step 5: Solve for x
    x = 19,793,322,674.88/171,515.60
  6. Step 6: Final answer
    x = 115,402.46

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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.