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Finding the Fourth Proportional to 79,668.30, 109,938.28 and 43,857.40

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Solution

The fourth proportional to 79,668.30, 109,938.28 and 43,857.40 is: 60,521.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,668.30 : 109,938.28 = 43,857.40 : x
  2. Step 2: Convert to fraction form
    79,668.30/109,938.28 = 43,857.40/x
  3. Step 3: Cross multiply
    79,668.30x = 109,938.28 × 43,857.40
  4. Step 4: Simplify right side
    79,668.30x = 4,821,607,121.27
  5. Step 5: Solve for x
    x = 4,821,607,121.27/79,668.30
  6. Step 6: Final answer
    x = 60,521.02

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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.