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Finding the Fourth Proportional to 79,660.80, 109,931.87 and 43,850.63

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Solution

The fourth proportional to 79,660.80, 109,931.87 and 43,850.63 is: 60,513.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,660.80 : 109,931.87 = 43,850.63 : x
  2. Step 2: Convert to fraction form
    79,660.80/109,931.87 = 43,850.63/x
  3. Step 3: Cross multiply
    79,660.80x = 109,931.87 × 43,850.63
  4. Step 4: Simplify right side
    79,660.80x = 4,820,581,756.58
  5. Step 5: Solve for x
    x = 4,820,581,756.58/79,660.80
  6. Step 6: Final answer
    x = 60,513.85

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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.