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Finding the Fourth Proportional to 55,424.60, 83,136.90 and 51,147.80

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Solution

The fourth proportional to 55,424.60, 83,136.90 and 51,147.80 is: 76,721.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,424.60 : 83,136.90 = 51,147.80 : x
  2. Step 2: Convert to fraction form
    55,424.60/83,136.90 = 51,147.80/x
  3. Step 3: Cross multiply
    55,424.60x = 83,136.90 × 51,147.80
  4. Step 4: Simplify right side
    55,424.60x = 4,252,269,533.82
  5. Step 5: Solve for x
    x = 4,252,269,533.82/55,424.60
  6. Step 6: Final answer
    x = 76,721.70

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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.