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Finding the Fourth Proportional to 172,912.32, 259,465.68 and 79,425.36

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Solution

The fourth proportional to 172,912.32, 259,465.68 and 79,425.36 is: 119,182.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,912.32 : 259,465.68 = 79,425.36 : x
  2. Step 2: Convert to fraction form
    172,912.32/259,465.68 = 79,425.36/x
  3. Step 3: Cross multiply
    172,912.32x = 259,465.68 × 79,425.36
  4. Step 4: Simplify right side
    172,912.32x = 20,608,155,041.64
  5. Step 5: Solve for x
    x = 20,608,155,041.64/172,912.32
  6. Step 6: Final answer
    x = 119,182.69

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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.