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Finding the Fourth Proportional to 118,771.11, 163,905.93 and 65,055.96

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Solution

The fourth proportional to 118,771.11, 163,905.93 and 65,055.96 is: 89,778.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,771.11 : 163,905.93 = 65,055.96 : x
  2. Step 2: Convert to fraction form
    118,771.11/163,905.93 = 65,055.96/x
  3. Step 3: Cross multiply
    118,771.11x = 163,905.93 × 65,055.96
  4. Step 4: Simplify right side
    118,771.11x = 10,663,057,625.84
  5. Step 5: Solve for x
    x = 10,663,057,625.84/118,771.11
  6. Step 6: Final answer
    x = 89,778.21

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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.