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Finding the Fourth Proportional to 139,160.88, 192,041.21 and 75,497.31

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Solution

The fourth proportional to 139,160.88, 192,041.21 and 75,497.31 is: 104,185.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,160.88 : 192,041.21 = 75,497.31 : x
  2. Step 2: Convert to fraction form
    139,160.88/192,041.21 = 75,497.31/x
  3. Step 3: Cross multiply
    139,160.88x = 192,041.21 × 75,497.31
  4. Step 4: Simplify right side
    139,160.88x = 14,498,594,386.66
  5. Step 5: Solve for x
    x = 14,498,594,386.66/139,160.88
  6. Step 6: Final answer
    x = 104,185.85

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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.