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Finding the Fourth Proportional to 171,509.60, 257,410.20 and 76,885.40

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Solution

The fourth proportional to 171,509.60, 257,410.20 and 76,885.40 is: 115,393.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,509.60 : 257,410.20 = 76,885.40 : x
  2. Step 2: Convert to fraction form
    171,509.60/257,410.20 = 76,885.40/x
  3. Step 3: Cross multiply
    171,509.60x = 257,410.20 × 76,885.40
  4. Step 4: Simplify right side
    171,509.60x = 19,791,086,191.08
  5. Step 5: Solve for x
    x = 19,791,086,191.08/171,509.60
  6. Step 6: Final answer
    x = 115,393.46

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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.