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Finding the Fourth Proportional to 143,139.80, 200,672.20 and 143,139.80

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Solution

The fourth proportional to 143,139.80, 200,672.20 and 143,139.80 is: 200,672.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,139.80 : 200,672.20 = 143,139.80 : x
  2. Step 2: Convert to fraction form
    143,139.80/200,672.20 = 143,139.80/x
  3. Step 3: Cross multiply
    143,139.80x = 200,672.20 × 143,139.80
  4. Step 4: Simplify right side
    143,139.80x = 28,724,178,573.56
  5. Step 5: Solve for x
    x = 28,724,178,573.56/143,139.80
  6. Step 6: Final answer
    x = 200,672.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.