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Finding the Fourth Proportional to 139,886.64, 209,891.93 and 73,310.94

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Solution

The fourth proportional to 139,886.64, 209,891.93 and 73,310.94 is: 109,998.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,886.64 : 209,891.93 = 73,310.94 : x
  2. Step 2: Convert to fraction form
    139,886.64/209,891.93 = 73,310.94/x
  3. Step 3: Cross multiply
    139,886.64x = 209,891.93 × 73,310.94
  4. Step 4: Simplify right side
    139,886.64x = 15,387,374,320.16
  5. Step 5: Solve for x
    x = 15,387,374,320.16/139,886.64
  6. Step 6: Final answer
    x = 109,998.88

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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.