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Finding the Fourth Proportional to 118,636.58, 163,718.47 and 64,921.61

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Solution

The fourth proportional to 118,636.58, 163,718.47 and 64,921.61 is: 89,591.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,636.58 : 163,718.47 = 64,921.61 : x
  2. Step 2: Convert to fraction form
    118,636.58/163,718.47 = 64,921.61/x
  3. Step 3: Cross multiply
    118,636.58x = 163,718.47 × 64,921.61
  4. Step 4: Simplify right side
    118,636.58x = 10,628,866,535.64
  5. Step 5: Solve for x
    x = 10,628,866,535.64/118,636.58
  6. Step 6: Final answer
    x = 89,591.82

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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.