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Finding the Fourth Proportional to 118,761.76, 163,889.57 and 67,790.65

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Solution

The fourth proportional to 118,761.76, 163,889.57 and 67,790.65 is: 93,550.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,761.76 : 163,889.57 = 67,790.65 : x
  2. Step 2: Convert to fraction form
    118,761.76/163,889.57 = 67,790.65/x
  3. Step 3: Cross multiply
    118,761.76x = 163,889.57 × 67,790.65
  4. Step 4: Simplify right side
    118,761.76x = 11,110,179,729.84
  5. Step 5: Solve for x
    x = 11,110,179,729.84/118,761.76
  6. Step 6: Final answer
    x = 93,550.15

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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.