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Finding the Fourth Proportional to 139,876.80, 209,877.21 and 73,301.10

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Solution

The fourth proportional to 139,876.80, 209,877.21 and 73,301.10 is: 109,984.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,876.80 : 209,877.21 = 73,301.10 : x
  2. Step 2: Convert to fraction form
    139,876.80/209,877.21 = 73,301.10/x
  3. Step 3: Cross multiply
    139,876.80x = 209,877.21 × 73,301.10
  4. Step 4: Simplify right side
    139,876.80x = 15,384,230,357.93
  5. Step 5: Solve for x
    x = 15,384,230,357.93/139,876.80
  6. Step 6: Final answer
    x = 109,984.15

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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.