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Finding the Fourth Proportional to 119,930.61, 165,504.42 and 66,215.67

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Solution

The fourth proportional to 119,930.61, 165,504.42 and 66,215.67 is: 91,377.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,930.61 : 165,504.42 = 66,215.67 : x
  2. Step 2: Convert to fraction form
    119,930.61/165,504.42 = 66,215.67/x
  3. Step 3: Cross multiply
    119,930.61x = 165,504.42 × 66,215.67
  4. Step 4: Simplify right side
    119,930.61x = 10,958,986,058.26
  5. Step 5: Solve for x
    x = 10,958,986,058.26/119,930.61
  6. Step 6: Final answer
    x = 91,377.72

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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.