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Finding the Fourth Proportional to 139,347.52, 192,297.76 and 75,687.36

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Solution

The fourth proportional to 139,347.52, 192,297.76 and 75,687.36 is: 104,447.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,347.52 : 192,297.76 = 75,687.36 : x
  2. Step 2: Convert to fraction form
    139,347.52/192,297.76 = 75,687.36/x
  3. Step 3: Cross multiply
    139,347.52x = 192,297.76 × 75,687.36
  4. Step 4: Simplify right side
    139,347.52x = 14,554,509,788.31
  5. Step 5: Solve for x
    x = 14,554,509,788.31/139,347.52
  6. Step 6: Final answer
    x = 104,447.57

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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.