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Finding the Fourth Proportional to 68,136.88, 102,197.53 and 18,220.87

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Solution

The fourth proportional to 68,136.88, 102,197.53 and 18,220.87 is: 27,329.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,136.88 : 102,197.53 = 18,220.87 : x
  2. Step 2: Convert to fraction form
    68,136.88/102,197.53 = 18,220.87/x
  3. Step 3: Cross multiply
    68,136.88x = 102,197.53 × 18,220.87
  4. Step 4: Simplify right side
    68,136.88x = 1,862,127,908.45
  5. Step 5: Solve for x
    x = 1,862,127,908.45/68,136.88
  6. Step 6: Final answer
    x = 27,329.22

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1.5x scale

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.