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Finding the Fourth Proportional to 139,940.88, 209,807.64 and 84,523.92

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Solution

The fourth proportional to 139,940.88, 209,807.64 and 84,523.92 is: 126,723.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,940.88 : 209,807.64 = 84,523.92 : x
  2. Step 2: Convert to fraction form
    139,940.88/209,807.64 = 84,523.92/x
  3. Step 3: Cross multiply
    139,940.88x = 209,807.64 × 84,523.92
  4. Step 4: Simplify right side
    139,940.88x = 17,733,764,178.75
  5. Step 5: Solve for x
    x = 17,733,764,178.75/139,940.88
  6. Step 6: Final answer
    x = 126,723.26

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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.