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Finding the Fourth Proportional to 139,073.85, 191,920.86 and 75,411.54

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Solution

The fourth proportional to 139,073.85, 191,920.86 and 75,411.54 is: 104,067.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,073.85 : 191,920.86 = 75,411.54 : x
  2. Step 2: Convert to fraction form
    139,073.85/191,920.86 = 75,411.54/x
  3. Step 3: Cross multiply
    139,073.85x = 191,920.86 × 75,411.54
  4. Step 4: Simplify right side
    139,073.85x = 14,473,047,610.72
  5. Step 5: Solve for x
    x = 14,473,047,610.72/139,073.85
  6. Step 6: Final answer
    x = 104,067.35

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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.