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Finding the Fourth Proportional to 427,557.88, 641,318.42 and 112,007.80

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Solution

The fourth proportional to 427,557.88, 641,318.42 and 112,007.80 is: 168,006.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,557.88 : 641,318.42 = 112,007.80 : x
  2. Step 2: Convert to fraction form
    427,557.88/641,318.42 = 112,007.80/x
  3. Step 3: Cross multiply
    427,557.88x = 641,318.42 × 112,007.80
  4. Step 4: Simplify right side
    427,557.88x = 71,832,665,323.68
  5. Step 5: Solve for x
    x = 71,832,665,323.68/427,557.88
  6. Step 6: Final answer
    x = 168,006.88

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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.