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Finding the Fourth Proportional to 133,263.81, 183,903.61 and 72,834.43

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Solution

The fourth proportional to 133,263.81, 183,903.61 and 72,834.43 is: 100,511.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,263.81 : 183,903.61 = 72,834.43 : x
  2. Step 2: Convert to fraction form
    133,263.81/183,903.61 = 72,834.43/x
  3. Step 3: Cross multiply
    133,263.81x = 183,903.61 × 72,834.43
  4. Step 4: Simplify right side
    133,263.81x = 13,394,514,609.29
  5. Step 5: Solve for x
    x = 13,394,514,609.29/133,263.81
  6. Step 6: Final answer
    x = 100,511.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.