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Finding the Fourth Proportional to 139,384.40, 192,352.56 and 75,723.44

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Solution

The fourth proportional to 139,384.40, 192,352.56 and 75,723.44 is: 104,499.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,384.40 : 192,352.56 = 75,723.44 : x
  2. Step 2: Convert to fraction form
    139,384.40/192,352.56 = 75,723.44/x
  3. Step 3: Cross multiply
    139,384.40x = 192,352.56 × 75,723.44
  4. Step 4: Simplify right side
    139,384.40x = 14,565,597,536.01
  5. Step 5: Solve for x
    x = 14,565,597,536.01/139,384.40
  6. Step 6: Final answer
    x = 104,499.48

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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.