Home / 231,980.28-347,885.05-80,138.71

Finding the Fourth Proportional to 231,980.28, 347,885.05 and 80,138.71

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Solution

The fourth proportional to 231,980.28, 347,885.05 and 80,138.71 is: 120,178.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,980.28 : 347,885.05 = 80,138.71 : x
  2. Step 2: Convert to fraction form
    231,980.28/347,885.05 = 80,138.71/x
  3. Step 3: Cross multiply
    231,980.28x = 347,885.05 × 80,138.71
  4. Step 4: Simplify right side
    231,980.28x = 27,879,059,135.29
  5. Step 5: Solve for x
    x = 27,879,059,135.29/231,980.28
  6. Step 6: Final answer
    x = 120,178.57

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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.