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Finding the Fourth Proportional to 79,447.88, 109,639.79 and 43,639.85

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Solution

The fourth proportional to 79,447.88, 109,639.79 and 43,639.85 is: 60,223.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,447.88 : 109,639.79 = 43,639.85 : x
  2. Step 2: Convert to fraction form
    79,447.88/109,639.79 = 43,639.85/x
  3. Step 3: Cross multiply
    79,447.88x = 109,639.79 × 43,639.85
  4. Step 4: Simplify right side
    79,447.88x = 4,784,663,989.63
  5. Step 5: Solve for x
    x = 4,784,663,989.63/79,447.88
  6. Step 6: Final answer
    x = 60,223.94

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1.5x scale

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.