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Finding the Fourth Proportional to 139,042.24, 191,879.24 and 75,381.04

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Solution

The fourth proportional to 139,042.24, 191,879.24 and 75,381.04 is: 104,026.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,042.24 : 191,879.24 = 75,381.04 : x
  2. Step 2: Convert to fraction form
    139,042.24/191,879.24 = 75,381.04/x
  3. Step 3: Cross multiply
    139,042.24x = 191,879.24 × 75,381.04
  4. Step 4: Simplify right side
    139,042.24x = 14,464,056,665.61
  5. Step 5: Solve for x
    x = 14,464,056,665.61/139,042.24
  6. Step 6: Final answer
    x = 104,026.35

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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.