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Finding the Fourth Proportional to 79,487.64, 109,694.25 and 43,679.16

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Solution

The fourth proportional to 79,487.64, 109,694.25 and 43,679.16 is: 60,277.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,487.64 : 109,694.25 = 43,679.16 : x
  2. Step 2: Convert to fraction form
    79,487.64/109,694.25 = 43,679.16/x
  3. Step 3: Cross multiply
    79,487.64x = 109,694.25 × 43,679.16
  4. Step 4: Simplify right side
    79,487.64x = 4,791,352,696.83
  5. Step 5: Solve for x
    x = 4,791,352,696.83/79,487.64
  6. Step 6: Final answer
    x = 60,277.96

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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.