Home / 68,211.40-102,332.64-20,830.84

Finding the Fourth Proportional to 68,211.40, 102,332.64 and 20,830.84

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Solution

The fourth proportional to 68,211.40, 102,332.64 and 20,830.84 is: 31,251.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,211.40 : 102,332.64 = 20,830.84 : x
  2. Step 2: Convert to fraction form
    68,211.40/102,332.64 = 20,830.84/x
  3. Step 3: Cross multiply
    68,211.40x = 102,332.64 × 20,830.84
  4. Step 4: Simplify right side
    68,211.40x = 2,131,674,850.62
  5. Step 5: Solve for x
    x = 2,131,674,850.62/68,211.40
  6. Step 6: Final answer
    x = 31,251.01

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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.