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Finding the Fourth Proportional to 79,679.76, 109,958.94 and 43,870.65

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Solution

The fourth proportional to 79,679.76, 109,958.94 and 43,870.65 is: 60,541.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,679.76 : 109,958.94 = 43,870.65 : x
  2. Step 2: Convert to fraction form
    79,679.76/109,958.94 = 43,870.65/x
  3. Step 3: Cross multiply
    79,679.76x = 109,958.94 × 43,870.65
  4. Step 4: Simplify right side
    79,679.76x = 4,823,970,171.11
  5. Step 5: Solve for x
    x = 4,823,970,171.11/79,679.76
  6. Step 6: Final answer
    x = 60,541.98

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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.