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Finding the Fourth Proportional to 79,457.28, 109,609.92 and 53,964.96

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Solution

The fourth proportional to 79,457.28, 109,609.92 and 53,964.96 is: 74,443.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,457.28 : 109,609.92 = 53,964.96 : x
  2. Step 2: Convert to fraction form
    79,457.28/109,609.92 = 53,964.96/x
  3. Step 3: Cross multiply
    79,457.28x = 109,609.92 × 53,964.96
  4. Step 4: Simplify right side
    79,457.28x = 5,915,094,948.40
  5. Step 5: Solve for x
    x = 5,915,094,948.40/79,457.28
  6. Step 6: Final answer
    x = 74,443.71

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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.