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Finding the Fourth Proportional to 143,458.80, 215,012.52 and 80,998.80

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Solution

The fourth proportional to 143,458.80, 215,012.52 and 80,998.80 is: 121,399.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,458.80 : 215,012.52 = 80,998.80 : x
  2. Step 2: Convert to fraction form
    143,458.80/215,012.52 = 80,998.80/x
  3. Step 3: Cross multiply
    143,458.80x = 215,012.52 × 80,998.80
  4. Step 4: Simplify right side
    143,458.80x = 17,415,756,104.98
  5. Step 5: Solve for x
    x = 17,415,756,104.98/143,458.80
  6. Step 6: Final answer
    x = 121,399.01

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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.