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Finding the Fourth Proportional to 118,777.38, 163,912.56 and 65,064.66

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Solution

The fourth proportional to 118,777.38, 163,912.56 and 65,064.66 is: 89,789.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,777.38 : 163,912.56 = 65,064.66 : x
  2. Step 2: Convert to fraction form
    118,777.38/163,912.56 = 65,064.66/x
  3. Step 3: Cross multiply
    118,777.38x = 163,912.56 × 65,064.66
  4. Step 4: Simplify right side
    118,777.38x = 10,664,914,986.13
  5. Step 5: Solve for x
    x = 10,664,914,986.13/118,777.38
  6. Step 6: Final answer
    x = 89,789.11

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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.