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Finding the Fourth Proportional to 118,651.40, 163,739 and 64,936.39

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Solution

The fourth proportional to 118,651.40, 163,739 and 64,936.39 is: 89,612.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,651.40 : 163,739 = 64,936.39 : x
  2. Step 2: Convert to fraction form
    118,651.40/163,739 = 64,936.39/x
  3. Step 3: Cross multiply
    118,651.40x = 163,739 × 64,936.39
  4. Step 4: Simplify right side
    118,651.40x = 10,632,619,562.21
  5. Step 5: Solve for x
    x = 10,632,619,562.21/118,651.40
  6. Step 6: Final answer
    x = 89,612.26

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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.