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Finding the Fourth Proportional to 143,777.94, 215,338.86 and 126,960

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Solution

The fourth proportional to 143,777.94, 215,338.86 and 126,960 is: 190,150.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,777.94 : 215,338.86 = 126,960 : x
  2. Step 2: Convert to fraction form
    143,777.94/215,338.86 = 126,960/x
  3. Step 3: Cross multiply
    143,777.94x = 215,338.86 × 126,960
  4. Step 4: Simplify right side
    143,777.94x = 27,339,421,665.60
  5. Step 5: Solve for x
    x = 27,339,421,665.60/143,777.94
  6. Step 6: Final answer
    x = 190,150.32

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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.