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Finding the Fourth Proportional to 139,510.80, 209,266.20 and 133,605.90

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Solution

The fourth proportional to 139,510.80, 209,266.20 and 133,605.90 is: 200,408.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,510.80 : 209,266.20 = 133,605.90 : x
  2. Step 2: Convert to fraction form
    139,510.80/209,266.20 = 133,605.90/x
  3. Step 3: Cross multiply
    139,510.80x = 209,266.20 × 133,605.90
  4. Step 4: Simplify right side
    139,510.80x = 27,959,198,990.58
  5. Step 5: Solve for x
    x = 27,959,198,990.58/139,510.80
  6. Step 6: Final answer
    x = 200,408.85

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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.