Home / 156,686.40-235,183.20-77,889.60

Finding the Fourth Proportional to 156,686.40, 235,183.20 and 77,889.60

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Solution

The fourth proportional to 156,686.40, 235,183.20 and 77,889.60 is: 116,910.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,686.40 : 235,183.20 = 77,889.60 : x
  2. Step 2: Convert to fraction form
    156,686.40/235,183.20 = 77,889.60/x
  3. Step 3: Cross multiply
    156,686.40x = 235,183.20 × 77,889.60
  4. Step 4: Simplify right side
    156,686.40x = 18,318,325,374.72
  5. Step 5: Solve for x
    x = 18,318,325,374.72/156,686.40
  6. Step 6: Final answer
    x = 116,910.76

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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.