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Finding the Fourth Proportional to 79,385.50, 109,560.66 and 50,731.54

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Solution

The fourth proportional to 79,385.50, 109,560.66 and 50,731.54 is: 70,015.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,385.50 : 109,560.66 = 50,731.54 : x
  2. Step 2: Convert to fraction form
    79,385.50/109,560.66 = 50,731.54/x
  3. Step 3: Cross multiply
    79,385.50x = 109,560.66 × 50,731.54
  4. Step 4: Simplify right side
    79,385.50x = 5,558,181,005.22
  5. Step 5: Solve for x
    x = 5,558,181,005.22/79,385.50
  6. Step 6: Final answer
    x = 70,015.07

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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.