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Finding the Fourth Proportional to 79,487.34, 109,694.43 and 43,680.75

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Solution

The fourth proportional to 79,487.34, 109,694.43 and 43,680.75 is: 60,280.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,487.34 : 109,694.43 = 43,680.75 : x
  2. Step 2: Convert to fraction form
    79,487.34/109,694.43 = 43,680.75/x
  3. Step 3: Cross multiply
    79,487.34x = 109,694.43 × 43,680.75
  4. Step 4: Simplify right side
    79,487.34x = 4,791,534,973.22
  5. Step 5: Solve for x
    x = 4,791,534,973.22/79,487.34
  6. Step 6: Final answer
    x = 60,280.48

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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.