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Finding the Fourth Proportional to 156,711.60, 235,168.20 and 86,641.20

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Solution

The fourth proportional to 156,711.60, 235,168.20 and 86,641.20 is: 130,017.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,711.60 : 235,168.20 = 86,641.20 : x
  2. Step 2: Convert to fraction form
    156,711.60/235,168.20 = 86,641.20/x
  3. Step 3: Cross multiply
    156,711.60x = 235,168.20 × 86,641.20
  4. Step 4: Simplify right side
    156,711.60x = 20,375,255,049.84
  5. Step 5: Solve for x
    x = 20,375,255,049.84/156,711.60
  6. Step 6: Final answer
    x = 130,017.53

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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.