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Finding the Fourth Proportional to 125,076.88, 172,571.88 and 80,390.80

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Solution

The fourth proportional to 125,076.88, 172,571.88 and 80,390.80 is: 110,917.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,076.88 : 172,571.88 = 80,390.80 : x
  2. Step 2: Convert to fraction form
    125,076.88/172,571.88 = 80,390.80/x
  3. Step 3: Cross multiply
    125,076.88x = 172,571.88 × 80,390.80
  4. Step 4: Simplify right side
    125,076.88x = 13,873,191,490.70
  5. Step 5: Solve for x
    x = 13,873,191,490.70/125,076.88
  6. Step 6: Final answer
    x = 110,917.31

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1.5x scale

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.