Home / 123,491.20-185,409.60-76,835.20

Finding the Fourth Proportional to 123,491.20, 185,409.60 and 76,835.20

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Solution

The fourth proportional to 123,491.20, 185,409.60 and 76,835.20 is: 115,360.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,491.20 : 185,409.60 = 76,835.20 : x
  2. Step 2: Convert to fraction form
    123,491.20/185,409.60 = 76,835.20/x
  3. Step 3: Cross multiply
    123,491.20x = 185,409.60 × 76,835.20
  4. Step 4: Simplify right side
    123,491.20x = 14,245,983,697.92
  5. Step 5: Solve for x
    x = 14,245,983,697.92/123,491.20
  6. Step 6: Final answer
    x = 115,360.31

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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.