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Finding the Fourth Proportional to 139,881.48, 209,884.23 and 73,305.78

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Solution

The fourth proportional to 139,881.48, 209,884.23 and 73,305.78 is: 109,991.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,881.48 : 209,884.23 = 73,305.78 : x
  2. Step 2: Convert to fraction form
    139,881.48/209,884.23 = 73,305.78/x
  3. Step 3: Cross multiply
    139,881.48x = 209,884.23 × 73,305.78
  4. Step 4: Simplify right side
    139,881.48x = 15,385,726,402.78
  5. Step 5: Solve for x
    x = 15,385,726,402.78/139,881.48
  6. Step 6: Final answer
    x = 109,991.16

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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.