Home / 172,870.20-259,211.70-77,989.50

Finding the Fourth Proportional to 172,870.20, 259,211.70 and 77,989.50

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Solution

The fourth proportional to 172,870.20, 259,211.70 and 77,989.50 is: 116,942.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,870.20 : 259,211.70 = 77,989.50 : x
  2. Step 2: Convert to fraction form
    172,870.20/259,211.70 = 77,989.50/x
  3. Step 3: Cross multiply
    172,870.20x = 259,211.70 × 77,989.50
  4. Step 4: Simplify right side
    172,870.20x = 20,215,790,877.15
  5. Step 5: Solve for x
    x = 20,215,790,877.15/172,870.20
  6. Step 6: Final answer
    x = 116,942.02

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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.