Home / 81,929.32-122,768.78-55,176.38

Finding the Fourth Proportional to 81,929.32, 122,768.78 and 55,176.38

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Solution

The fourth proportional to 81,929.32, 122,768.78 and 55,176.38 is: 82,680.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,929.32 : 122,768.78 = 55,176.38 : x
  2. Step 2: Convert to fraction form
    81,929.32/122,768.78 = 55,176.38/x
  3. Step 3: Cross multiply
    81,929.32x = 122,768.78 × 55,176.38
  4. Step 4: Simplify right side
    81,929.32x = 6,773,935,967.69
  5. Step 5: Solve for x
    x = 6,773,935,967.69/81,929.32
  6. Step 6: Final answer
    x = 82,680.24

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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.