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Finding the Fourth Proportional to 143,709.97, 215,564.97 and 43,870.69

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Solution

The fourth proportional to 143,709.97, 215,564.97 and 43,870.69 is: 65,806.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,709.97 : 215,564.97 = 43,870.69 : x
  2. Step 2: Convert to fraction form
    143,709.97/215,564.97 = 43,870.69/x
  3. Step 3: Cross multiply
    143,709.97x = 215,564.97 × 43,870.69
  4. Step 4: Simplify right side
    143,709.97x = 9,456,983,973.73
  5. Step 5: Solve for x
    x = 9,456,983,973.73/143,709.97
  6. Step 6: Final answer
    x = 65,806.04

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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.