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Finding the Fourth Proportional to 119,660.10, 165,128.45 and 65,943.73

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Solution

The fourth proportional to 119,660.10, 165,128.45 and 65,943.73 is: 91,000.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,660.10 : 165,128.45 = 65,943.73 : x
  2. Step 2: Convert to fraction form
    119,660.10/165,128.45 = 65,943.73/x
  3. Step 3: Cross multiply
    119,660.10x = 165,128.45 × 65,943.73
  4. Step 4: Simplify right side
    119,660.10x = 10,889,185,922.12
  5. Step 5: Solve for x
    x = 10,889,185,922.12/119,660.10
  6. Step 6: Final answer
    x = 91,000.98

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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.