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Finding the Fourth Proportional to 172,920.62, 259,421.03 and 67,740.50

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Solution

The fourth proportional to 172,920.62, 259,421.03 and 67,740.50 is: 101,626.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,920.62 : 259,421.03 = 67,740.50 : x
  2. Step 2: Convert to fraction form
    172,920.62/259,421.03 = 67,740.50/x
  3. Step 3: Cross multiply
    172,920.62x = 259,421.03 × 67,740.50
  4. Step 4: Simplify right side
    172,920.62x = 17,573,309,944.01
  5. Step 5: Solve for x
    x = 17,573,309,944.01/172,920.62
  6. Step 6: Final answer
    x = 101,626.46

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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.