Home / 128,015.72-176,612.42-80,185.80

Finding the Fourth Proportional to 128,015.72, 176,612.42 and 80,185.80

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Solution

The fourth proportional to 128,015.72, 176,612.42 and 80,185.80 is: 110,625.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,015.72 : 176,612.42 = 80,185.80 : x
  2. Step 2: Convert to fraction form
    128,015.72/176,612.42 = 80,185.80/x
  3. Step 3: Cross multiply
    128,015.72x = 176,612.42 × 80,185.80
  4. Step 4: Simplify right side
    128,015.72x = 14,161,808,187.64
  5. Step 5: Solve for x
    x = 14,161,808,187.64/128,015.72
  6. Step 6: Final answer
    x = 110,625.54

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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.