Home / 45,811.20-68,716.80-31,814.40

Finding the Fourth Proportional to 45,811.20, 68,716.80 and 31,814.40

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Solution

The fourth proportional to 45,811.20, 68,716.80 and 31,814.40 is: 47,721.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,811.20 : 68,716.80 = 31,814.40 : x
  2. Step 2: Convert to fraction form
    45,811.20/68,716.80 = 31,814.40/x
  3. Step 3: Cross multiply
    45,811.20x = 68,716.80 × 31,814.40
  4. Step 4: Simplify right side
    45,811.20x = 2,186,183,761.92
  5. Step 5: Solve for x
    x = 2,186,183,761.92/45,811.20
  6. Step 6: Final answer
    x = 47,721.60

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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.