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Finding the Fourth Proportional to 79,640.73, 109,891.61 and 45,642.67

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Solution

The fourth proportional to 79,640.73, 109,891.61 and 45,642.67 is: 62,979.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,640.73 : 109,891.61 = 45,642.67 : x
  2. Step 2: Convert to fraction form
    79,640.73/109,891.61 = 45,642.67/x
  3. Step 3: Cross multiply
    79,640.73x = 109,891.61 × 45,642.67
  4. Step 4: Simplify right side
    79,640.73x = 5,015,745,988.06
  5. Step 5: Solve for x
    x = 5,015,745,988.06/79,640.73
  6. Step 6: Final answer
    x = 62,979.66

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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.