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Finding the Fourth Proportional to 139,381.94, 209,086.70 and 44,588.31

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Solution

The fourth proportional to 139,381.94, 209,086.70 and 44,588.31 is: 66,886.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,381.94 : 209,086.70 = 44,588.31 : x
  2. Step 2: Convert to fraction form
    139,381.94/209,086.70 = 44,588.31/x
  3. Step 3: Cross multiply
    139,381.94x = 209,086.70 × 44,588.31
  4. Step 4: Simplify right side
    139,381.94x = 9,322,822,373.54
  5. Step 5: Solve for x
    x = 9,322,822,373.54/139,381.94
  6. Step 6: Final answer
    x = 66,886.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.