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Finding the Fourth Proportional to 139,605.79, 192,655.84 and 75,943.43

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Solution

The fourth proportional to 139,605.79, 192,655.84 and 75,943.43 is: 104,801.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,605.79 : 192,655.84 = 75,943.43 : x
  2. Step 2: Convert to fraction form
    139,605.79/192,655.84 = 75,943.43/x
  3. Step 3: Cross multiply
    139,605.79x = 192,655.84 × 75,943.43
  4. Step 4: Simplify right side
    139,605.79x = 14,630,944,919.41
  5. Step 5: Solve for x
    x = 14,630,944,919.41/139,605.79
  6. Step 6: Final answer
    x = 104,801.85

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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.