Home / 76,519.28-114,785.52-21,115.28

Finding the Fourth Proportional to 76,519.28, 114,785.52 and 21,115.28

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Solution

The fourth proportional to 76,519.28, 114,785.52 and 21,115.28 is: 31,674.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,519.28 : 114,785.52 = 21,115.28 : x
  2. Step 2: Convert to fraction form
    76,519.28/114,785.52 = 21,115.28/x
  3. Step 3: Cross multiply
    76,519.28x = 114,785.52 × 21,115.28
  4. Step 4: Simplify right side
    76,519.28x = 2,423,728,394.75
  5. Step 5: Solve for x
    x = 2,423,728,394.75/76,519.28
  6. Step 6: Final answer
    x = 31,674.74

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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.