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Finding the Fourth Proportional to 172,987.25, 259,491.80 and 73,128.83

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Solution

The fourth proportional to 172,987.25, 259,491.80 and 73,128.83 is: 109,697.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,987.25 : 259,491.80 = 73,128.83 : x
  2. Step 2: Convert to fraction form
    172,987.25/259,491.80 = 73,128.83/x
  3. Step 3: Cross multiply
    172,987.25x = 259,491.80 × 73,128.83
  4. Step 4: Simplify right side
    172,987.25x = 18,976,330,613.96
  5. Step 5: Solve for x
    x = 18,976,330,613.96/172,987.25
  6. Step 6: Final answer
    x = 109,697.86

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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.