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Finding the Fourth Proportional to 139,530.88, 192,552.96 and 75,868.64

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Solution

The fourth proportional to 139,530.88, 192,552.96 and 75,868.64 is: 104,698.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,530.88 : 192,552.96 = 75,868.64 : x
  2. Step 2: Convert to fraction form
    139,530.88/192,552.96 = 75,868.64/x
  3. Step 3: Cross multiply
    139,530.88x = 192,552.96 × 75,868.64
  4. Step 4: Simplify right side
    139,530.88x = 14,608,731,203.17
  5. Step 5: Solve for x
    x = 14,608,731,203.17/139,530.88
  6. Step 6: Final answer
    x = 104,698.91

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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.