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Finding the Fourth Proportional to 139,281.30, 192,208.49 and 75,617.73

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Solution

The fourth proportional to 139,281.30, 192,208.49 and 75,617.73 is: 104,352.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,281.30 : 192,208.49 = 75,617.73 : x
  2. Step 2: Convert to fraction form
    139,281.30/192,208.49 = 75,617.73/x
  3. Step 3: Cross multiply
    139,281.30x = 192,208.49 × 75,617.73
  4. Step 4: Simplify right side
    139,281.30x = 14,534,369,700.53
  5. Step 5: Solve for x
    x = 14,534,369,700.53/139,281.30
  6. Step 6: Final answer
    x = 104,352.63

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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.