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Finding the Fourth Proportional to 118,705.76, 163,814.43 and 64,995.78

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Solution

The fourth proportional to 118,705.76, 163,814.43 and 64,995.78 is: 89,694.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,705.76 : 163,814.43 = 64,995.78 : x
  2. Step 2: Convert to fraction form
    118,705.76/163,814.43 = 64,995.78/x
  3. Step 3: Cross multiply
    118,705.76x = 163,814.43 × 64,995.78
  4. Step 4: Simplify right side
    118,705.76x = 10,647,246,653.11
  5. Step 5: Solve for x
    x = 10,647,246,653.11/118,705.76
  6. Step 6: Final answer
    x = 89,694.44

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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.