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Finding the Fourth Proportional to 156,773.10, 234,986.85 and 86,702.70

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Solution

The fourth proportional to 156,773.10, 234,986.85 and 86,702.70 is: 129,958.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,773.10 : 234,986.85 = 86,702.70 : x
  2. Step 2: Convert to fraction form
    156,773.10/234,986.85 = 86,702.70/x
  3. Step 3: Cross multiply
    156,773.10x = 234,986.85 × 86,702.70
  4. Step 4: Simplify right side
    156,773.10x = 20,373,994,359.50
  5. Step 5: Solve for x
    x = 20,373,994,359.50/156,773.10
  6. Step 6: Final answer
    x = 129,958.48

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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.