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Finding the Fourth Proportional to 71,978.67, 108,000.81 and 36,942.93

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Solution

The fourth proportional to 71,978.67, 108,000.81 and 36,942.93 is: 55,431.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,978.67 : 108,000.81 = 36,942.93 : x
  2. Step 2: Convert to fraction form
    71,978.67/108,000.81 = 36,942.93/x
  3. Step 3: Cross multiply
    71,978.67x = 108,000.81 × 36,942.93
  4. Step 4: Simplify right side
    71,978.67x = 3,989,866,363.77
  5. Step 5: Solve for x
    x = 3,989,866,363.77/71,978.67
  6. Step 6: Final answer
    x = 55,431.23

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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.