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Finding the Fourth Proportional to 79,882.61, 119,828.43 and 20,716.70

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Solution

The fourth proportional to 79,882.61, 119,828.43 and 20,716.70 is: 31,076.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,882.61 : 119,828.43 = 20,716.70 : x
  2. Step 2: Convert to fraction form
    79,882.61/119,828.43 = 20,716.70/x
  3. Step 3: Cross multiply
    79,882.61x = 119,828.43 × 20,716.70
  4. Step 4: Simplify right side
    79,882.61x = 2,482,449,036.64
  5. Step 5: Solve for x
    x = 2,482,449,036.64/79,882.61
  6. Step 6: Final answer
    x = 31,076.22

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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.