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Finding the Fourth Proportional to 118,636.66, 163,718.59 and 64,921.68

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Solution

The fourth proportional to 118,636.66, 163,718.59 and 64,921.68 is: 89,591.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,636.66 : 163,718.59 = 64,921.68 : x
  2. Step 2: Convert to fraction form
    118,636.66/163,718.59 = 64,921.68/x
  3. Step 3: Cross multiply
    118,636.66x = 163,718.59 × 64,921.68
  4. Step 4: Simplify right side
    118,636.66x = 10,628,885,747.73
  5. Step 5: Solve for x
    x = 10,628,885,747.73/118,636.66
  6. Step 6: Final answer
    x = 89,591.92

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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.