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Finding the Fourth Proportional to 139,621.44, 192,744.51 and 85,952.46

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Solution

The fourth proportional to 139,621.44, 192,744.51 and 85,952.46 is: 118,655.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,621.44 : 192,744.51 = 85,952.46 : x
  2. Step 2: Convert to fraction form
    139,621.44/192,744.51 = 85,952.46/x
  3. Step 3: Cross multiply
    139,621.44x = 192,744.51 × 85,952.46
  4. Step 4: Simplify right side
    139,621.44x = 16,566,864,785.99
  5. Step 5: Solve for x
    x = 16,566,864,785.99/139,621.44
  6. Step 6: Final answer
    x = 118,655.59

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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.