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Finding the Fourth Proportional to 118,710.93, 163,821.10 and 64,995.96

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Solution

The fourth proportional to 118,710.93, 163,821.10 and 64,995.96 is: 89,694.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,710.93 : 163,821.10 = 64,995.96 : x
  2. Step 2: Convert to fraction form
    118,710.93/163,821.10 = 64,995.96/x
  3. Step 3: Cross multiply
    118,710.93x = 163,821.10 × 64,995.96
  4. Step 4: Simplify right side
    118,710.93x = 10,647,709,662.76
  5. Step 5: Solve for x
    x = 10,647,709,662.76/118,710.93
  6. Step 6: Final answer
    x = 89,694.43

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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.