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Finding the Fourth Proportional to 72,984.87, 109,428.71 and 26,231.67

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Solution

The fourth proportional to 72,984.87, 109,428.71 and 26,231.67 is: 39,330.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,984.87 : 109,428.71 = 26,231.67 : x
  2. Step 2: Convert to fraction form
    72,984.87/109,428.71 = 26,231.67/x
  3. Step 3: Cross multiply
    72,984.87x = 109,428.71 × 26,231.67
  4. Step 4: Simplify right side
    72,984.87x = 2,870,497,678.09
  5. Step 5: Solve for x
    x = 2,870,497,678.09/72,984.87
  6. Step 6: Final answer
    x = 39,330.04

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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.