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Finding the Fourth Proportional to 118,758, 163,879.79 and 65,041.88

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Solution

The fourth proportional to 118,758, 163,879.79 and 65,041.88 is: 89,754.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,758 : 163,879.79 = 65,041.88 : x
  2. Step 2: Convert to fraction form
    118,758/163,879.79 = 65,041.88/x
  3. Step 3: Cross multiply
    118,758x = 163,879.79 × 65,041.88
  4. Step 4: Simplify right side
    118,758x = 10,659,048,491.00
  5. Step 5: Solve for x
    x = 10,659,048,491.00/118,758
  6. Step 6: Final answer
    x = 89,754.36

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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.