Home / 120,379.52-180,600-76,319.36

Finding the Fourth Proportional to 120,379.52, 180,600 and 76,319.36

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Solution

The fourth proportional to 120,379.52, 180,600 and 76,319.36 is: 114,498.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,379.52 : 180,600 = 76,319.36 : x
  2. Step 2: Convert to fraction form
    120,379.52/180,600 = 76,319.36/x
  3. Step 3: Cross multiply
    120,379.52x = 180,600 × 76,319.36
  4. Step 4: Simplify right side
    120,379.52x = 13,783,276,416
  5. Step 5: Solve for x
    x = 13,783,276,416/120,379.52
  6. Step 6: Final answer
    x = 114,498.52

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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.