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Finding the Fourth Proportional to 86,136.44, 118,878.13 and 47,899.80

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Solution

The fourth proportional to 86,136.44, 118,878.13 and 47,899.80 is: 66,107.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,136.44 : 118,878.13 = 47,899.80 : x
  2. Step 2: Convert to fraction form
    86,136.44/118,878.13 = 47,899.80/x
  3. Step 3: Cross multiply
    86,136.44x = 118,878.13 × 47,899.80
  4. Step 4: Simplify right side
    86,136.44x = 5,694,238,651.37
  5. Step 5: Solve for x
    x = 5,694,238,651.37/86,136.44
  6. Step 6: Final answer
    x = 66,107.20

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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.