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Finding the Fourth Proportional to 172,002.99, 257,921.02 and 72,136.37

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Solution

The fourth proportional to 172,002.99, 257,921.02 and 72,136.37 is: 108,169.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,002.99 : 257,921.02 = 72,136.37 : x
  2. Step 2: Convert to fraction form
    172,002.99/257,921.02 = 72,136.37/x
  3. Step 3: Cross multiply
    172,002.99x = 257,921.02 × 72,136.37
  4. Step 4: Simplify right side
    172,002.99x = 18,605,486,129.50
  5. Step 5: Solve for x
    x = 18,605,486,129.50/172,002.99
  6. Step 6: Final answer
    x = 108,169.55

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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.