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Finding the Fourth Proportional to 118,676, 163,772.88 and 65,684

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Solution

The fourth proportional to 118,676, 163,772.88 and 65,684 is: 90,643.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,676 : 163,772.88 = 65,684 : x
  2. Step 2: Convert to fraction form
    118,676/163,772.88 = 65,684/x
  3. Step 3: Cross multiply
    118,676x = 163,772.88 × 65,684
  4. Step 4: Simplify right side
    118,676x = 10,757,257,849.92
  5. Step 5: Solve for x
    x = 10,757,257,849.92/118,676
  6. Step 6: Final answer
    x = 90,643.92

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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.