Home / 76,845.12-105,834.32-66,230.88

Finding the Fourth Proportional to 76,845.12, 105,834.32 and 66,230.88

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Solution

The fourth proportional to 76,845.12, 105,834.32 and 66,230.88 is: 91,215.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,845.12 : 105,834.32 = 66,230.88 : x
  2. Step 2: Convert to fraction form
    76,845.12/105,834.32 = 66,230.88/x
  3. Step 3: Cross multiply
    76,845.12x = 105,834.32 × 66,230.88
  4. Step 4: Simplify right side
    76,845.12x = 7,009,500,147.80
  5. Step 5: Solve for x
    x = 7,009,500,147.80/76,845.12
  6. Step 6: Final answer
    x = 91,215.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.