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Finding the Fourth Proportional to 172,749.42, 259,087.41 and 72,871.02

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Solution

The fourth proportional to 172,749.42, 259,087.41 and 72,871.02 is: 109,291.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,749.42 : 259,087.41 = 72,871.02 : x
  2. Step 2: Convert to fraction form
    172,749.42/259,087.41 = 72,871.02/x
  3. Step 3: Cross multiply
    172,749.42x = 259,087.41 × 72,871.02
  4. Step 4: Simplify right side
    172,749.42x = 18,879,963,835.86
  5. Step 5: Solve for x
    x = 18,879,963,835.86/172,749.42
  6. Step 6: Final answer
    x = 109,291.04

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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.