Home / 76,621.20-114,931.80-21,217.20

Finding the Fourth Proportional to 76,621.20, 114,931.80 and 21,217.20

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Solution

The fourth proportional to 76,621.20, 114,931.80 and 21,217.20 is: 31,825.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,621.20 : 114,931.80 = 21,217.20 : x
  2. Step 2: Convert to fraction form
    76,621.20/114,931.80 = 21,217.20/x
  3. Step 3: Cross multiply
    76,621.20x = 114,931.80 × 21,217.20
  4. Step 4: Simplify right side
    76,621.20x = 2,438,530,986.96
  5. Step 5: Solve for x
    x = 2,438,530,986.96/76,621.20
  6. Step 6: Final answer
    x = 31,825.80

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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.