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Finding the Fourth Proportional to 79,934.31, 119,206.69 and 78,861.75

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Solution

The fourth proportional to 79,934.31, 119,206.69 and 78,861.75 is: 117,607.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,934.31 : 119,206.69 = 78,861.75 : x
  2. Step 2: Convert to fraction form
    79,934.31/119,206.69 = 78,861.75/x
  3. Step 3: Cross multiply
    79,934.31x = 119,206.69 × 78,861.75
  4. Step 4: Simplify right side
    79,934.31x = 9,400,847,589.07
  5. Step 5: Solve for x
    x = 9,400,847,589.07/79,934.31
  6. Step 6: Final answer
    x = 117,607.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.