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Finding the Fourth Proportional to 172,012.87, 257,884.10 and 108,699.83

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Solution

The fourth proportional to 172,012.87, 257,884.10 and 108,699.83 is: 162,964.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,012.87 : 257,884.10 = 108,699.83 : x
  2. Step 2: Convert to fraction form
    172,012.87/257,884.10 = 108,699.83/x
  3. Step 3: Cross multiply
    172,012.87x = 257,884.10 × 108,699.83
  4. Step 4: Simplify right side
    172,012.87x = 28,031,956,404.41
  5. Step 5: Solve for x
    x = 28,031,956,404.41/172,012.87
  6. Step 6: Final answer
    x = 162,964.30

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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.