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Finding the Fourth Proportional to 43,136.80, 64,678.80 and 16,811.20

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Solution

The fourth proportional to 43,136.80, 64,678.80 and 16,811.20 is: 25,206.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,136.80 : 64,678.80 = 16,811.20 : x
  2. Step 2: Convert to fraction form
    43,136.80/64,678.80 = 16,811.20/x
  3. Step 3: Cross multiply
    43,136.80x = 64,678.80 × 16,811.20
  4. Step 4: Simplify right side
    43,136.80x = 1,087,328,242.56
  5. Step 5: Solve for x
    x = 1,087,328,242.56/43,136.80
  6. Step 6: Final answer
    x = 25,206.51

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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.