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Finding the Fourth Proportional to 139,108.80, 191,970.18 and 75,446.04

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Solution

The fourth proportional to 139,108.80, 191,970.18 and 75,446.04 is: 104,115.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,108.80 : 191,970.18 = 75,446.04 : x
  2. Step 2: Convert to fraction form
    139,108.80/191,970.18 = 75,446.04/x
  3. Step 3: Cross multiply
    139,108.80x = 191,970.18 × 75,446.04
  4. Step 4: Simplify right side
    139,108.80x = 14,483,389,879.09
  5. Step 5: Solve for x
    x = 14,483,389,879.09/139,108.80
  6. Step 6: Final answer
    x = 104,115.55

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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.