Home / 156,968.80-235,453.20-78,236.80

Finding the Fourth Proportional to 156,968.80, 235,453.20 and 78,236.80

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Solution

The fourth proportional to 156,968.80, 235,453.20 and 78,236.80 is: 117,355.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,968.80 : 235,453.20 = 78,236.80 : x
  2. Step 2: Convert to fraction form
    156,968.80/235,453.20 = 78,236.80/x
  3. Step 3: Cross multiply
    156,968.80x = 235,453.20 × 78,236.80
  4. Step 4: Simplify right side
    156,968.80x = 18,421,104,917.76
  5. Step 5: Solve for x
    x = 18,421,104,917.76/156,968.80
  6. Step 6: Final answer
    x = 117,355.20

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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.