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Finding the Fourth Proportional to 68,136.60, 102,221.25 and 21,389.46

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Solution

The fourth proportional to 68,136.60, 102,221.25 and 21,389.46 is: 32,089.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,136.60 : 102,221.25 = 21,389.46 : x
  2. Step 2: Convert to fraction form
    68,136.60/102,221.25 = 21,389.46/x
  3. Step 3: Cross multiply
    68,136.60x = 102,221.25 × 21,389.46
  4. Step 4: Simplify right side
    68,136.60x = 2,186,457,338.03
  5. Step 5: Solve for x
    x = 2,186,457,338.03/68,136.60
  6. Step 6: Final answer
    x = 32,089.32

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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.