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Finding the Fourth Proportional to 139,053.54, 191,894.30 and 75,391.36

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Solution

The fourth proportional to 139,053.54, 191,894.30 and 75,391.36 is: 104,040.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,053.54 : 191,894.30 = 75,391.36 : x
  2. Step 2: Convert to fraction form
    139,053.54/191,894.30 = 75,391.36/x
  3. Step 3: Cross multiply
    139,053.54x = 191,894.30 × 75,391.36
  4. Step 4: Simplify right side
    139,053.54x = 14,467,172,253.25
  5. Step 5: Solve for x
    x = 14,467,172,253.25/139,053.54
  6. Step 6: Final answer
    x = 104,040.30

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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.