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Finding the Fourth Proportional to 56,481.81, 78,026.01 and 45,136.44

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Solution

The fourth proportional to 56,481.81, 78,026.01 and 45,136.44 is: 62,353.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,481.81 : 78,026.01 = 45,136.44 : x
  2. Step 2: Convert to fraction form
    56,481.81/78,026.01 = 45,136.44/x
  3. Step 3: Cross multiply
    56,481.81x = 78,026.01 × 45,136.44
  4. Step 4: Simplify right side
    56,481.81x = 3,521,816,318.80
  5. Step 5: Solve for x
    x = 3,521,816,318.80/56,481.81
  6. Step 6: Final answer
    x = 62,353.11

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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.