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Finding the Fourth Proportional to 118,648.12, 163,752.80 and 67,660.96

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Solution

The fourth proportional to 118,648.12, 163,752.80 and 67,660.96 is: 93,382.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,648.12 : 163,752.80 = 67,660.96 : x
  2. Step 2: Convert to fraction form
    118,648.12/163,752.80 = 67,660.96/x
  3. Step 3: Cross multiply
    118,648.12x = 163,752.80 × 67,660.96
  4. Step 4: Simplify right side
    118,648.12x = 11,079,671,650.69
  5. Step 5: Solve for x
    x = 11,079,671,650.69/118,648.12
  6. Step 6: Final answer
    x = 93,382.61

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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.