Home / 81,890.84-122,795.26-25,730.21

Finding the Fourth Proportional to 81,890.84, 122,795.26 and 25,730.21

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Solution

The fourth proportional to 81,890.84, 122,795.26 and 25,730.21 is: 38,582.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,890.84 : 122,795.26 = 25,730.21 : x
  2. Step 2: Convert to fraction form
    81,890.84/122,795.26 = 25,730.21/x
  3. Step 3: Cross multiply
    81,890.84x = 122,795.26 × 25,730.21
  4. Step 4: Simplify right side
    81,890.84x = 3,159,548,069.47
  5. Step 5: Solve for x
    x = 3,159,548,069.47/81,890.84
  6. Step 6: Final answer
    x = 38,582.43

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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.