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Finding the Fourth Proportional to 81,687.29, 112,740.66 and 49,874.67

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Solution

The fourth proportional to 81,687.29, 112,740.66 and 49,874.67 is: 68,834.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,687.29 : 112,740.66 = 49,874.67 : x
  2. Step 2: Convert to fraction form
    81,687.29/112,740.66 = 49,874.67/x
  3. Step 3: Cross multiply
    81,687.29x = 112,740.66 × 49,874.67
  4. Step 4: Simplify right side
    81,687.29x = 5,622,903,213.08
  5. Step 5: Solve for x
    x = 5,622,903,213.08/81,687.29
  6. Step 6: Final answer
    x = 68,834.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.