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Finding the Fourth Proportional to 118,297.69, 177,267 and 86,728.78

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Solution

The fourth proportional to 118,297.69, 177,267 and 86,728.78 is: 129,961.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,297.69 : 177,267 = 86,728.78 : x
  2. Step 2: Convert to fraction form
    118,297.69/177,267 = 86,728.78/x
  3. Step 3: Cross multiply
    118,297.69x = 177,267 × 86,728.78
  4. Step 4: Simplify right side
    118,297.69x = 15,374,150,644.26
  5. Step 5: Solve for x
    x = 15,374,150,644.26/118,297.69
  6. Step 6: Final answer
    x = 129,961.55

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1.5x scale

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.