Home / 156,879.40-235,221.90-90,286.60

Finding the Fourth Proportional to 156,879.40, 235,221.90 and 90,286.60

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Solution

The fourth proportional to 156,879.40, 235,221.90 and 90,286.60 is: 135,373.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,879.40 : 235,221.90 = 90,286.60 : x
  2. Step 2: Convert to fraction form
    156,879.40/235,221.90 = 90,286.60/x
  3. Step 3: Cross multiply
    156,879.40x = 235,221.90 × 90,286.60
  4. Step 4: Simplify right side
    156,879.40x = 21,237,385,596.54
  5. Step 5: Solve for x
    x = 21,237,385,596.54/156,879.40
  6. Step 6: Final answer
    x = 135,373.96

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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.