Home / 76,780.56-115,116.32-29,355.68

Finding the Fourth Proportional to 76,780.56, 115,116.32 and 29,355.68

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Solution

The fourth proportional to 76,780.56, 115,116.32 and 29,355.68 is: 44,012.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,780.56 : 115,116.32 = 29,355.68 : x
  2. Step 2: Convert to fraction form
    76,780.56/115,116.32 = 29,355.68/x
  3. Step 3: Cross multiply
    76,780.56x = 115,116.32 × 29,355.68
  4. Step 4: Simplify right side
    76,780.56x = 3,379,317,852.70
  5. Step 5: Solve for x
    x = 3,379,317,852.70/76,780.56
  6. Step 6: Final answer
    x = 44,012.68

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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.