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Finding the Fourth Proportional to 119,879.70, 165,434.32 and 65,432.36

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Solution

The fourth proportional to 119,879.70, 165,434.32 and 65,432.36 is: 90,296.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,879.70 : 165,434.32 = 65,432.36 : x
  2. Step 2: Convert to fraction form
    119,879.70/165,434.32 = 65,432.36/x
  3. Step 3: Cross multiply
    119,879.70x = 165,434.32 × 65,432.36
  4. Step 4: Simplify right side
    119,879.70x = 10,824,757,179.35
  5. Step 5: Solve for x
    x = 10,824,757,179.35/119,879.70
  6. Step 6: Final answer
    x = 90,296.84

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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.