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Finding the Fourth Proportional to 343,136.21, 514,769.03 and 129,967.94

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Solution

The fourth proportional to 343,136.21, 514,769.03 and 129,967.94 is: 194,976.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,136.21 : 514,769.03 = 129,967.94 : x
  2. Step 2: Convert to fraction form
    343,136.21/514,769.03 = 129,967.94/x
  3. Step 3: Cross multiply
    343,136.21x = 514,769.03 × 129,967.94
  4. Step 4: Simplify right side
    343,136.21x = 66,903,470,404.90
  5. Step 5: Solve for x
    x = 66,903,470,404.90/343,136.21
  6. Step 6: Final answer
    x = 194,976.42

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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.