Home / 83,939.20-125,860.80-31,350.40

Finding the Fourth Proportional to 83,939.20, 125,860.80 and 31,350.40

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Solution

The fourth proportional to 83,939.20, 125,860.80 and 31,350.40 is: 47,007.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,939.20 : 125,860.80 = 31,350.40 : x
  2. Step 2: Convert to fraction form
    83,939.20/125,860.80 = 31,350.40/x
  3. Step 3: Cross multiply
    83,939.20x = 125,860.80 × 31,350.40
  4. Step 4: Simplify right side
    83,939.20x = 3,945,786,424.32
  5. Step 5: Solve for x
    x = 3,945,786,424.32/83,939.20
  6. Step 6: Final answer
    x = 47,007.67

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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.