Home / 81,819.32-122,730.50-25,658.18

Finding the Fourth Proportional to 81,819.32, 122,730.50 and 25,658.18

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Solution

The fourth proportional to 81,819.32, 122,730.50 and 25,658.18 is: 38,487.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,819.32 : 122,730.50 = 25,658.18 : x
  2. Step 2: Convert to fraction form
    81,819.32/122,730.50 = 25,658.18/x
  3. Step 3: Cross multiply
    81,819.32x = 122,730.50 × 25,658.18
  4. Step 4: Simplify right side
    81,819.32x = 3,149,041,260.49
  5. Step 5: Solve for x
    x = 3,149,041,260.49/81,819.32
  6. Step 6: Final answer
    x = 38,487.75

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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.