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Finding the Fourth Proportional to 55,136.80, 82,705.20 and 49,013.20

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Solution

The fourth proportional to 55,136.80, 82,705.20 and 49,013.20 is: 73,519.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,136.80 : 82,705.20 = 49,013.20 : x
  2. Step 2: Convert to fraction form
    55,136.80/82,705.20 = 49,013.20/x
  3. Step 3: Cross multiply
    55,136.80x = 82,705.20 × 49,013.20
  4. Step 4: Simplify right side
    55,136.80x = 4,053,646,508.64
  5. Step 5: Solve for x
    x = 4,053,646,508.64/55,136.80
  6. Step 6: Final answer
    x = 73,519.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.