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Finding the Fourth Proportional to 79,478.10, 109,680.08 and 43,668.81

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Solution

The fourth proportional to 79,478.10, 109,680.08 and 43,668.81 is: 60,263.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,478.10 : 109,680.08 = 43,668.81 : x
  2. Step 2: Convert to fraction form
    79,478.10/109,680.08 = 43,668.81/x
  3. Step 3: Cross multiply
    79,478.10x = 109,680.08 × 43,668.81
  4. Step 4: Simplify right side
    79,478.10x = 4,789,598,355.96
  5. Step 5: Solve for x
    x = 4,789,598,355.96/79,478.10
  6. Step 6: Final answer
    x = 60,263.12

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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.