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Finding the Fourth Proportional to 118,772.75, 177,986.90 and 65,475.56

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Solution

The fourth proportional to 118,772.75, 177,986.90 and 65,475.56 is: 98,118.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,772.75 : 177,986.90 = 65,475.56 : x
  2. Step 2: Convert to fraction form
    118,772.75/177,986.90 = 65,475.56/x
  3. Step 3: Cross multiply
    118,772.75x = 177,986.90 × 65,475.56
  4. Step 4: Simplify right side
    118,772.75x = 11,653,792,558.82
  5. Step 5: Solve for x
    x = 11,653,792,558.82/118,772.75
  6. Step 6: Final answer
    x = 98,118.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.