Home / 81,420.71-122,318.18-57,786.94

Finding the Fourth Proportional to 81,420.71, 122,318.18 and 57,786.94

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Solution

The fourth proportional to 81,420.71, 122,318.18 and 57,786.94 is: 86,813.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,420.71 : 122,318.18 = 57,786.94 : x
  2. Step 2: Convert to fraction form
    81,420.71/122,318.18 = 57,786.94/x
  3. Step 3: Cross multiply
    81,420.71x = 122,318.18 × 57,786.94
  4. Step 4: Simplify right side
    81,420.71x = 7,068,393,328.57
  5. Step 5: Solve for x
    x = 7,068,393,328.57/81,420.71
  6. Step 6: Final answer
    x = 86,813.21

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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.