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Finding the Fourth Proportional to 79,136.44, 109,209.66 and 48,921.01

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Solution

The fourth proportional to 79,136.44, 109,209.66 and 48,921.01 is: 67,511.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,136.44 : 109,209.66 = 48,921.01 : x
  2. Step 2: Convert to fraction form
    79,136.44/109,209.66 = 48,921.01/x
  3. Step 3: Cross multiply
    79,136.44x = 109,209.66 × 48,921.01
  4. Step 4: Simplify right side
    79,136.44x = 5,342,646,868.96
  5. Step 5: Solve for x
    x = 5,342,646,868.96/79,136.44
  6. Step 6: Final answer
    x = 67,511.84

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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.