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Finding the Fourth Proportional to 171,505.60, 257,404.20 and 76,881.40

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Solution

The fourth proportional to 171,505.60, 257,404.20 and 76,881.40 is: 115,387.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,505.60 : 257,404.20 = 76,881.40 : x
  2. Step 2: Convert to fraction form
    171,505.60/257,404.20 = 76,881.40/x
  3. Step 3: Cross multiply
    171,505.60x = 257,404.20 × 76,881.40
  4. Step 4: Simplify right side
    171,505.60x = 19,789,595,261.88
  5. Step 5: Solve for x
    x = 19,789,595,261.88/171,505.60
  6. Step 6: Final answer
    x = 115,387.46

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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.