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Finding the Fourth Proportional to 171,878.02, 257,917.37 and 72,029.93

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Solution

The fourth proportional to 171,878.02, 257,917.37 and 72,029.93 is: 108,086.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,878.02 : 257,917.37 = 72,029.93 : x
  2. Step 2: Convert to fraction form
    171,878.02/257,917.37 = 72,029.93/x
  3. Step 3: Cross multiply
    171,878.02x = 257,917.37 × 72,029.93
  4. Step 4: Simplify right side
    171,878.02x = 18,577,768,457.15
  5. Step 5: Solve for x
    x = 18,577,768,457.15/171,878.02
  6. Step 6: Final answer
    x = 108,086.94

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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.