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Finding the Fourth Proportional to 119,876.45, 165,429.84 and 65,429.12

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Solution

The fourth proportional to 119,876.45, 165,429.84 and 65,429.12 is: 90,292.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,876.45 : 165,429.84 = 65,429.12 : x
  2. Step 2: Convert to fraction form
    119,876.45/165,429.84 = 65,429.12/x
  3. Step 3: Cross multiply
    119,876.45x = 165,429.84 × 65,429.12
  4. Step 4: Simplify right side
    119,876.45x = 10,823,928,025.79
  5. Step 5: Solve for x
    x = 10,823,928,025.79/119,876.45
  6. Step 6: Final answer
    x = 90,292.37

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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.