Home / 81,717.12-122,501.70-56,768.85

Finding the Fourth Proportional to 81,717.12, 122,501.70 and 56,768.85

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Solution

The fourth proportional to 81,717.12, 122,501.70 and 56,768.85 is: 85,101.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,717.12 : 122,501.70 = 56,768.85 : x
  2. Step 2: Convert to fraction form
    81,717.12/122,501.70 = 56,768.85/x
  3. Step 3: Cross multiply
    81,717.12x = 122,501.70 × 56,768.85
  4. Step 4: Simplify right side
    81,717.12x = 6,954,280,632.05
  5. Step 5: Solve for x
    x = 6,954,280,632.05/81,717.12
  6. Step 6: Final answer
    x = 85,101.88

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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.